D-Bot Core-XY 3D Printer

by spauda01, published

D-Bot Core-XY 3D Printer by spauda01 Sep 6, 2015
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Remix of the Core-XY C-Bot.

300mm x 200mm x 325mm print volume

$550 approximate cost

Read the build guide before ordering parts.

Larger cover photo: http://i.imgur.com/oFbBbEb.jpg

Example prints made with the D-Bot: http://www.thingiverse.com/spauda01/makes

Demo Videos: https://www.youtube.com/playlist?list=PLtTX7qAE76Mwo2uvCK9YH6KMR-vQdPqly

All credit for the original C-Bot design goes to cfeniak.
Thanks to those who contributed at http://www.openbuilds.com/threads/c-bot.726/

Optional Components

Ramps 1.4 Enclosure - http://www.thingiverse.com/thing:1352320
Cable Chain - http://www.thingiverse.com/thing:1167746
Vslot Endcaps - http://www.thingiverse.com/thing:398515
Tubing Clips - http://www.thingiverse.com/thing:1232213
Bowden retraction stabilizer - http://www.thingiverse.com/thing:936611
Extruder Manual Feed Knob (small) - http://www.thingiverse.com/thing:474394
Vslot Channel Cover - http://www.thingiverse.com/thing:832077

D-Bot and C-Bot Differences

1) The lead screws and Z motors were moved forward to better lift the print bed from its center of gravity rather than use a fully cantilevered print bed.
2) Increased printable Z height to 330mm (~13")
3) Use of 20mm rails for the bottom sections to save cost and reduce bulk.
4) Various adjustments of printable parts, either to add plastic where it seemed like more rigidity was needed or to subtract plastic where it was not needed.
5) Accessories such as a simplified spool holder a cable chain for bed wiring
6) Relocated endstop mounting to maximize Y travel and utilize default homing scheme.
7) Overall reduction in cost compared to the original bill of materials (2$ square nuts vs 40$ Tnuts, etc.)

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I followed the build guide. Making mine a 300x300mm. The The table doesn't line up with the supports. Its to wide...?

320MM from screw to screw on the bed.. Your design has the supports at 306MM

[Y-Axis Issue]

My printer is have one issue. It moves forward to home y-axis.

I've tried to change the config file to:
// Sets direction of endstops when homing; 1=MAX, -1=MIN
define X_HOME_DIR -1
define Y_HOME_DIR -1
define Z_HOME_DIR -1

I've tried inverting the y-axis in the repetier-host.

Nothing is working. Help please!

If everything is the same parts and setup as the build guide then you should double check your wiring between the y endstop and the control board

The end stop works fine. The problem is when I press home, the y-axis moves forward instead of backwards.

I am new to 3D printing ,I have finished building the printer and I have hooked everything where is it supposed to go. What would be a safe way to move the axis without breaking anything?

Just followed the steps in the codeing part and i clicked the verify button but an error came up:

sketch\temperature.cpp:565:46: warning: extra tokens at end of #ifdef directive


Any ideas on how i can fix this or if its even a problem?

I hope someone can help me with my problem. I have everything built and ready to go. Only issue is the homing and the moving on the axis. Z axis works well when moving it but when I home it it just rams into the endstop and keeps on trying to move, same with the X and Y. Also on the X and Y when trying to manually move them I can only do it in .1 increments or else it either freezes up, moves really jerky or moves really jerky AND moves both X and Y when I only ever tried to move one direction. Hope this makes since and I hope someone else has had this problem and fixed it so I will be able to too. Ive been working on this thing on and off for the better part of 6 months and I really just want to get it going so I can start making all the cool stuff I see on this site, not to mention have a bad ass 3D printer.

thank you!

I got 9% discount at banggood here:


with this coupon:


Good Afternoon, Please forgive my Noob Comment, I'm have build a few 3d printer like the MPCNC and MakerFR, I'm sure I'm messing it up somewhere ;XD, so after I load the firmware to Arduino it pass the verify part, and goes to upload the firmware over to mega2560 board however the screen power up, But no content on the screen. As a test I loaded other firmware and it powers up with the content. any Idea would be much appreciated

Thanks advance

The default dbot firmware has no settings for a screen

Is it possible to add this, and if so, how?


thank you

Unbelieavable cool Design!

I orderd all parts today, and hope im able the assemble it soon!

I was luckyl and got up to 11% on almost every part on Banggood:


Thank you soooo much! :)

Comments deleted.

All 5 motors (X,Y,Z1,Z2,E) of my D bot move in only one direction. What should I do?

Double check the wiring diagram for your motors compared to the motors in the bom and the Dbot electrical diagram

Thanks...i tried..but no result
i have motors wiring as follows:
A+ : Green
A- : Black
B+ : Red
B- : Blue
on the ramps 1.4, the connection for motor is 2B,2A,1A,1B
so how should be the pin connections

Comparing your motor wiring colors to mine I think you need

2B green
2A black
1A red
1B blue

That would be the order for the E0 and Z pins, the X and Y connector are reversed as shown in the Dbot electrical diagram

Comments deleted.

I am having issues with my print layers shifting. I cannot figure out what is causing it. I do not believe it is the belt slipping, but it may be from the drivers overheating or the head moving too fast. I am not sure. Has anyone had similar issues or know how to troubleshoot this issue?

Alright I have determined that the printer only shifts layers if the part has travel moves. As long as the part dpesnt have travel moves it prints fine. Does anyone know why this is?

Your travels might be too fast

After upload dbot firmware, I have problem in testing z axis movement. I use repetier to move z axis down is ok but when I tried to move up (negative z move) z axis,the axis still move down. Anyone have experience with this issue? Thanks in advance for your help.

Aug 9, 2017 - Modified Aug 9, 2017
jhelmstetter - in reply to jacky007

What do you have your Z axis Vref set to? I had to increase mine to provide more current to the stepper drivers since it is one driver and two steppers.

You're right, I have to increase driver's Vref to 1.1V to make it move up correctly. Thanks

Aug 6, 2017 - Modified Aug 17, 2017


I am having trouble with the heated bed as well. I can turn it on with the Repetier-Host controls, and both the RAMPs light and SSR light come on. When I try to turn it off, both lights go off, however the bed continues to heat.

Checking with a multimeter, both the on and off commands seem to be sent to the SSR. The voltage changes from a fluctuating number to a constant 12V when the command is sent, and back to a fluctuating number when disabled. Yet the bed continues to heat.

I saw your advice many comments below to check the amperage in this instance, but I'm unsure of what I should be looking for.

Also, did you use a cable to connect the LED controller to the LEDs, or cut the two female ends and wire them together directly?

Update: Swapping out the DC - AC Solid State Relay for a DC - DC relay solved the issue. Discovered my error from this post:


Check that the tabs of the mosfets on the ramps board are not touching eachother and no wiring is touching the tabs since they are live. I wired the led strip up to a 4 pin connector and plugged that into the led controller

I found a bit of solder connecting two of the mosfet connectors underneath the RAMPs. Removing it only turned off the red light next to the extruder light that turned on with the power.

Removing all of the wiring and reconnecting it had no effect. Is there another way of testing for what might be the issue?

Aug 6, 2017 - Modified Aug 6, 2017
1sPiRe - in reply to PrintError

It might comes from the SSR which stays on even without the on command. But instead of testing voltage after the SSR -which is dangerous-, if I were you I would simply test the Ramps bed output with the extruder heater. If it works fine with the extruder heater, then it will mean that your SSR is bad quality and has to be replaced.

Aug 6, 2017 - Modified Aug 6, 2017
PrintError - in reply to 1sPiRe

It does seem to be the SSR. After wiring the extruder heater to the RAMPs bed output I was able to control the temperature.

I also tried wiring the bed directly to the RAMPs bed output. The 14 awg wires did not exactly fit well in the smaller slot, but I could control the temperature. I get the impression this is not a permanent solution and a new SSR is necessary.

Edit: I'm thinking the problem may be because the SSR relay on the Bill of Materials was unavailable and I purchased a different one. Except instead noticing it was 40a, I bought a 25a one:


Is it beneficial to go higher than 40a in any way?

What voltage (AC/DC?) does your bed take? The SSR that you linked to is for AC switching. "Output voltage: 24-380V AC"

This one is hard to beat if you need DC output:

I'm so close to being done however when ever I plug in my printer, the heated bed heats up without direction. How can I fix this?

I had the same issue and it was due to incorrect wiring on the Solid State Relay. I also did not notice the small red jumper cable on the wiring diagram connecting the 11a to 5a on the RAMPS board.

I found some other useful wiring diagrams online by googling "3d printer solid state relay wiring" and looking at the images.

Does anyone know of a good enclosure design that would work well for this printer?

Hi All,
I just finished the mounting of a big d-bot (600x300x460) and I am experimenting an strange issue, the two Z motors move to the same rotation in one Z direction but in the oposite rotation when the oposite Z direction, so the bed twists. I am astonish! The connections are made completely equal for the two motors.
Additionally when I click for a X movement, the head does not move in the X direction, moves in X sometimes and in Y sometimes, also with the Y movement happens the similar problem. I cannot understand where the problem is.
Anyone have experimented a similar problem? It seems that the connections are according the Spauda manual, (that is excellent)
Thanks in advance if anyone gives me feed-back. Sorry for disturb!

If you are using the same motors connected the same way (at least for each phase) then it is not possible. So I presume that when you lower the bed everything goes ok but when you raise it, only one side goes up while the other one doesn't move. If it is acting this way it means that your motors doesn't get enough current/torque. Did you tune your drivers? especially for a wide and/or heavie bed you'll need a good motors and drivers combo.

Thanks 1sPiRe.
The mystery has been resolved. I investigate what you said about the movement towards up and low in order to see the differences and discover the problem it was a cable issue in one motor.
The problems with X and Y, persists. I don't know.
Thanks to everybody.

Sounds like maybe you picked CoreXZ instead of CoreXY for your motion control...

Thanks David for your answer. Yes is the same effect, but how can be possible? the two Z motors are connected equally to the two 4x pins Z area in the Ramps 1.4. It´s crazy!
I used two different Ramps to double check the problem and it persists. so is not the board.
Any recommendation to start from zero?
I am no so expert in electronic, but the connections are so easy that I cannot understand!
Thanks for your helping.

I can't say with any real certainty, I'd need to see how it's wired up, the firmware and configuration, etc. I'm probably not the best person to answer RAMPS questions (I haven't used a RAMPS board in years), but if the motors are connected to two different leads then it sounds like a software problem.

On a ramps board the two Z outputs are tied to the same physical traces and driven by one stepper driver

This is the most strange thing, I cannot understand where is the issue,
Anyway thanks for your comments.

Aug 4, 2017 - Modified Aug 4, 2017
spiffcow - in reply to spauda01

In hardware? I have an old RAMPS clone for another printer that has 5 driver slots.. Are you saying that one of those driver slots is unused?

That's for an optional second extruder

Will increasing or decreasing the force on the idler bearing on the extruder help prevent grinding? If so which?

If you are grinding filament it is because the filament isn't flowing through the hot end quick enough. This could be due to several reasons: the nozzle may be clogged or partial clogged, nozzle is too close to the print bed, the hot end isn't hot enough, you are trying to extrude too fast, or the extruded steps per mm is set incorrectly

I am having some issues with my Y axis endstop. No matter what i do to the 20mm M5 bolt, it can not seem to trigger the endstop.

Large washers can do the job.

Okay. Thank you

If the bolt doesnt touch the switch then bend the metal switch tab forwarrd

Okay. Thank you

I am having issues with my heatbed. I have it set to 70 for the first layer and 0 for other layers in Slic3r, however, it is not turning off automatically like it should be.

@Spauda01 I am also having issues with the Z-Axis. It is only moving half as much as it should be. I tell it to move 10mm and it only moves 5mm. I have tried to find the code in Config.h that defines steps per unit for the motors but cannot.

I resolved this issue changing the DEFAULT_AXIS_STEPS_PER_UNIT parameters to a double value than the original.

Aug 16, 2017 - Modified Aug 16, 2017
Ramonsaizg - in reply to TWHerrin

Hi Taylor,
Did you solve the issue related with the Z movement?
I have the same problem. When I order 100mm, the Z-axis moves 50. I checked the three jumpers pins are correctly connected under each stepper chip.
To me, also X and Y have the same undesirable effect. The movements are half of the expected.

Double check that you have jumper pins under each stepper chip to set the proper microstepping

Question. The hotbed frame. Why not extend it to the front, and have it slide on those uprights also? WOuldn't that make it more stable, or do you not notice an issue at all?

No issues at all. If you extend the front out you are just adding unnecessary mass and now you have to deal with aligning 16 wheels on the uprights

I have no experience in aligned wheels to the V-slot rail so I don't know how difficult that is to do. The mass is only moving in one axis and at a very slow rate; for a print of average size. Intuitively it seems like extending to the front would help with rigidity and help maintain the level. Can anyone chime in here?

thank you.

I assume the K rail / Z screws are positioned to lift the bed system at its center of gravity. Any help on what this position is for 300x300 build?


I need help figuring out why my extruder will not heat up. I have troubleshooted and researched this problem for about 3 days, but have been unable to solve it. I have determined that the heater cartridge is good, and I have tested it with another one just to be sure it wasn't the problem. I also know that the connections at the Ramps board are getting the required 12V when I turn the extruder on, and when I check the ends of the wires with nothing attached to them I get 12V as well, however, when I attach the hotend I no longer get any power off the wires. Why is that? I checked to see if decoupling was the problem and I don't think it is. The Marlin says that it expects a 4 degree Celsius increase in 40 seconds, which should be correct. I have no idea what the problem is, and I haven't found anything helpful online. Everything else on my printer works fine, the motors work normally, the bed heats, etc. Only the hotend does not heat at all.

Have you tested the thermistor? swap the hot end and bed thermistor and heat up the bed and see if the temp labeled hot end rises

I am having issues with my X and Y endstops. When the printer homes in the x and y directions at the same time it homes in the X direction first, and then in the Y. However, once the printer hits the Y endstop it moves off the Y and then hits it again and it does this about 20 or so times rapidly until it just stops. It does the same thing for both the X and Y endstops once the Y switch is hit. It only does this when homing both at the same time, such as at the beginning of a print. When homing individually they work fine.

Yeah I figured out I just had some wires flipped, simple mistake.

@spauda01 I noticed you have a video on your channel with the TMC2100 drivers. I am installing them now. What voltages did you set for your X and Y?

Pro tip - If you have your limit switches plugged in wrong it will cause your ramps 1.4 board not to power up.

Is there any reason that the bed is using 2040 extrusions? I'm currently trying to upgrade my already built d-bot.

Comments deleted.

I'm working on this project and i made some changes. For example i changed print volume to 40cmx40cmx40cm What i wanna ask is should i change stepper motor or power supply to stronger one? you know.. will i need more power because i change the dimension?

You don't need to change the stepper motors for the larger build volume, but you probably want something better than at 12v PCB heated bed at that size. Depending on your choice there you may need to run a 24 volt power supply.

what is the bed that you have in the picture?

Comments deleted.

I installed a 5x Smoothieboard - I setup for double stepper motors - gamma is a slave to epislon
Can someone send me their config file showing the working stepper motor config for
epislon_step_pin gussed at 2.8
epislon_dir_pin guessed at 3.13
epislon_en_pin gussed at 4.29
I have commented out the gamma step, dir and en entries
My Z axis just hums with no movement

Is there a list of how many of each printed part is needed? Can't seem to find one.

The first part of the file name indicates the copy count.

Oh, god. How obvious :D Thanks.

I got a problem homing y.
All the axis works ok, only problem is homing y - it goes away from endstop switch!?
Is there a simple solution that i missed!?

I have the same problem.
Did you find any solution ?

Probably something wired backwards if you used the default firmware

I used a D-bot_Marlin firmware.
I will try to change the wiring of a motor .
There's nothing in the firmware to invert Y only ?

If you used the stock firmware and wired it according to the wiring diagram it shouldnt go backwards so double check the wiring and pin connections on the ramps board

Jul 5, 2017 - Modified Jul 5, 2017
fuginator - in reply to Ivooec

The homing direction can be changed in the firmware.
Y_HOME_DIR should be what you want to look for.

Any thoughts as to why my (genuine) e3d v6 hot end mounts a bit loose? When performing the steps listed on page 35 of the build guide, the hot end can still move up/down a few mm. Certainly this is an issue.

that happend to me with a clone. not with the genuine one though.

I have been working on building this printer for a while now, and I am just getting to the testing stage. I had everything wired up and was using A4988 motor drivers, however both of the z motors would not run, I was having stalling issues. So I switched the driver for the z motors to a DRV8825 motor driver, however, now my z motors are not doing anything at all. Does anyone know what I am doing wrong? Any help is appreciated.

I flipped the driver around and put it in the other way, however, it seems as though it is backwards compared to the other drivers, but it is working now. Both motors are working, but it still seems like I am having a jamming issue, and the motors are making all kinds of high pitched squealing noises which I am sure are not good. It may just be because the lead screws are not lined up properly. If anyone has any advice it would be appreciated.

I always feels stupid looking at these. Can you buy a premade and programed pcb and just throw it in here or with minimal adjustments?

"these" are not for the faint of heart, "these" are for makers.

Comments deleted.

Hey, first thanks for this project plus the very good and precise manual.

Actually im buying all stuff for building, i got everything except screws and the extrusions.

I have a 200x300 bed. I am right, that if i order profiles for 300x300, i can easily install my smaller bed, and can upgrade later easy too?

Best regards from germany!

I did just that but if you do, then you want to set your z axis closer to the center of the platform. I installed it at the dimensions for the 200x300 and now I have to try and shift the z axis after all my wiring has been hidden in the split loom. I built this first for a friend and there are a lot of little things that I will do different when I build mine.

Thanks for the answer, already ordered the profiles for 200x300 heatbed. I think I will be fine with the size:)

I am currently buying items for this printer off the bill of materials, but i cant seem to find any sort of springs. Any recommendations? please leave either links or specific measurements thank you

Build guide, page 33 and 52

If you have problem with your Z axes (motor stall), try the DRV8825 driver instead of the A4988. My chineese a4988 was over estimate the current through the step motor.

The current for the Z driver is twice the current of the X or Y axes because there are two motor.

Just to let you know all what problem I met and how I solved it.

Gibt es hier deutsche die den D-Bot gebaut haben? Wo habt ihr da V-Profil und auch die restlichen Komponenten gekauft?


In germany (and belgium/netherlands) the cheapest source is watterott.com (They get their supply from the portugese company ratrig and order in batches).

1st of all a big thank you for sharing this. i Love it. and i am going to build one.
i am wondering if it wound not be better to exchange the Corner Bracket with a Metal one.

Are there more parts that can be replaced by stock steel or alloy parts?

Has anyone made the D-Bot bigger jet?

Thank You

I am in the testing and troubleshooting phase now, and while manually moving each direction in Octoprint, the X is reversed. a G0 X10 moves towards home. G0 X-10 moves away. Y and Z are both moving in the correct directions, however, a G0 Z10 will only move one motor, but homing z will move both z motors. Is there a way to reverse the X? Any insight would be greatly appreciated.

change your stepper driver motor wires.
that way you can change the direction

Im building this CoreXY but im going to use 3mm instead of 1.75mm
Any chance that you can make a design for the extruder 3.00mm,

For whoever it is interesting, here is a link for the frame , mechanical and hardware combo, enjoy!!!

small heads up for any UK dbotters, after a lot of searching the only place i could find that let me buy odd numbers/singles of screws at a good price is https://www.orbitalfasteners.co.uk/ the parts plus shipping came to about £25~

all the other places i checked out were either ridiculously expensive to the mr metric quotes (up to 80 quid on one site) or minimum order for each part was 50 pieces which was no good when you only needed two.

So finally got mine built. Had trouble with the 2 Z axis but finally upped the voltage on the motors and now they work great. I put a Titan Aero on it also, so nice to have the direct drive and e3d hotend. Everything is printing very nicely. I have only taken it up to 100mm/s speed on my prints.
Will try more tests at higher speeds to see if it can maintain the quality also. Had to do quite abit of fine tuning for Simplify3D but I think its just about where I want it. Will post pics sometime in the Made area once I get a Nice Ramps box made for it.

Yep, I had to increase my ref voltage on the Z axis as well. If you think about it the stepper driver limits the amount of current going to the stepper motor. With two stepper motors running off of one driver the available current is shared between the two.

Hi all.
Has anyone got a simplify3d profile I can try please?

No one got a simplify3d fff file for me try?

I use simplify3D but I do not know how or where to find my profile to send you

Jul 9, 2017 - Modified Jul 9, 2017
deuse - in reply to Cantaris

Hi dude. In simplify3d, go to File then export your FFF profile. You can send it to [email protected] please
Also it's good to make a backup of you fff profile just in case.

I will try it when I get it as see what mistakes I am doing. Thanks very much dude :)

Jun 10, 2017 - Modified Jun 10, 2017

I have a 300mm x 300mm x 3mm aluminum bed. Right now I have an equally sized MK2 PCB heater at 12v. Roughly this configuration comes out to about 100 watts which is not really adequate. Can anyone recommend a DC heater that will let me get to 100 - 120 Celcius? I do have a 24 volt DC 20 amp power supply I could use as well. Or should I just switch over to an AC voltage silicone heater?

Update: I just did a PID tune @ 40C and it takes about 8 minutes to get to 40C from 25C.

Jun 9, 2017 - Modified Jun 9, 2017

hi spauda01!

i'm running through the bom, checking part availability and building my order when I found the automationdirect stepper motor link is not working as the source seems to have updated the part to the KL17H248-15-4A motor instead of the kl17h247.

should i run with the KL17H248-15-4A?

this is a [email protected] machine and i've gotta have it.

yes and it looks like it is even cheaper here from the same vendor


The motors in this link are not rated for 12V but 4.2V do we need to purchase different motor drivers for these?

These are fine. For stepper motors, the maximum voltage can be calculated by multiplying 32 by the square root of the inductance (L) in millihenries (mH).

Vmax = 32 * SQRT(L)

So for this particular stepper the inductance is 4.8mH which equates to a max voltage of 67.88 volts. I'm not saying you should run these at that voltage but in theory you could. I have built a few CNC routers and during my research found this link as a good reference for explaining stepper motors. http://www.geckodrive.com/support/step-motor-basics.html

thanks man!

i shall click add-to-cart!

How did you get the bowden tube stabilizer clip to work? The mounting system for the hotend doesn't let it sit flush with the top of the hotend.

it goes on the extruder side, not the hot end side

I see, I was worried my retraction issues were from the clip on the hotend side bobbing up and down but I'll put it on the extruder.

Jun 6, 2017 - Modified Jun 6, 2017

is there a plan/design/instructions to use a single stepper nema 23 for the z axis? (move the bed up and down)

Any idea why if the Y axis is setting on the Y home switch, the X won't home with auto home?
If I back it off the Y.. it all homes normally.

I did have the same weird homing behavior until I changed the firmware to marlin RC8. I have no clue why it act this way.

The BOM has a dead link to mr. metric site. Square nut link on row 55 has changed.

If someone has the size info on the M5 square nut, please tell. There are quite a few different M5 square nuts.

square thin nuts din562

thank you for fast response! And thank you for this project.

Hello! Wanted to know about the printer's programming.

this kind of questions never lead anywhere. you have to be more spesific, i know you can do better than last post.

What retraction setting would be a good starting point. I love my dbot but am getting some stringing

About 4.5mm, 40mm/s

Hey guys! I've almost finished assembling my D-Bot and I'm at the stage of runnings the belt. I've hooked up the belts to the belt clamps as shown in the guide (http://tinypic.com/m/jt6uk3/1), but when I run the belts around to the pulleys, it appears that the belt is twisted around the wrong way. Are you supposed to twist the belt? Here's some pics of my belt orientation: https://goo.gl/photos/5vjVUBE1egrchdNK6

Can anyone advise if I've done something wrong or if I need to twist the belt? I can't imagine that we'd have to twist the belt...

No twisting needed, the teeth should face the insides of the two motor pulleys, look at the main pictures

Got it. I started from the rear plate and assumed the flat part of the belt ran along the bearings on the rear idler. Thanks for your help spauda01!

Anyone switch out the printed wheel spacers for metal?

I thought i saw it somewhere but cant recall what the dimensions on the spacer are.

Comments deleted.
May 30, 2017 - Modified May 30, 2017
gyrex - in reply to Mallcrawler

Yep, I bought mini V wheels which came with spacers and shims and did the same as Cyrrus.

I was clued in to these:

They work perfectly without washers or shims.

Perfect, thank you.

Yep. I bought the 1mm shims and 6mm spacers. You'll need 1x shim and 1x spacer either side of the wheels. Just make sure the shims are in direct contact with the bearings and not the spacers since the spacers are too wide and will stop the bearings from turning. I also put a metal shim between the bearings inside the wheel.

Sourcing a BOM for a D-Bot now and this whole project and thread is a fantastic resource.

Just for clarification, using the print carriage as an example below. you basically replaced each of the green printed spacers with an aluminum spacer and a shim positioned between the wheel and the spacer?


Trying to estimate how many spacers and shims I'll need. I am using the three-wheel mods posted elsewhere.


• Printed spacer becomes 1x 1mm Al shim and 1x 6mm Al spacer. Make sure the shim, not spacer, is in contact with the bearing.
• Printed shim becomes 1x 1mm Al shim
• Added 1x 1mm Al shim between the MR105ZZ bearings within the wheels.

Wow, the cable management is simply beautiful and clean. Well done.

Do the X,Y&Z stepper motors have to be 76oz-in? I have 3x 17HS5415 and 1x 17HS8401 from an old printer. Will I at least get away with lower speeds?

Do you have to use Mini wheels for this or can you use the standard v wheels?


The STL files are designed for mini wheels, but you can always redesign the sizes for standard sizes or purchase the OpenBuilds gantry sets.

link is broken on the nema 17 motors. anyone have the specs/model number?

May 15, 2017 - Modified May 15, 2017

I am building on your design and I want to make 400x400x400 or 600height is it possible with this frame?
Railing lengths required for a build based on a 400x400mm bed?



I just finish the build. But result for z-axis is not good. When I homing z axis heatbed  is tilting at the tip to much. So calibration is change at the tip, always. Any solution to stop this tilting.

May 11, 2017 - Modified May 11, 2017

Can this printer print .1mm layer height?

has anyone had issues with the eBay ramps 1.4 that is linked in the bill of materials? is there a better one?

yes it can.

duet wifi, MKS smoothie.. plenty options out there.

I recently finished constructing the printer however I seem to be having problems with the X-Y motion. I'm new to 3D printing so I'm having diffculty pinpoiting the problem and if it's a Hardware or a software issue.

The X-Y carrige will move the full 300mm but in the interface it states it moved about 150mm give or take.
The print never starts 100% in the center but if often near the center.
I've been able to print the 20mm Test cube fairly well but when I try to print the benchy the layers are often off in groups. The most problematic section is the arch on the print where it will Zig-zag back and fourth.

Any help will be greatly appreciated.

May 26, 2017 - Modified May 26, 2017
Fireflynj - in reply to momo3419

if you find the movement is consistently 2x more then what the interface states, then maybe micro stepping setting is wrong, check http://forums.reprap.org/read.php?1,122029. If inconsistently then stepper motors are skipping, need to adjust stepper motor driver voltage, use a good multi-meter!

Is it better to buy 196 x M5 x 12mm screws instead of the 196 x M5 x 10mm?

I dont think 12 will fit

May 19, 2017 - Modified May 20, 2017
Cyrrus - in reply to spauda01

I managed to do it that way. You need to add 2 washers per screw, which is fine if you want to make the second washer a spring washer. Just make sure that the spring washer is between the screw head and the flat washer.
BTW, any hole with a bore that was intended to house an M5x10 screw will still need an M5x10 since the washers won't fit. This also applies to the corner brackets and 1 screw on the inner side of each rear idler.
Just a heads up though, this is overkill. I just happened to have the parts.

Hi, where can i find the build cuide?! Pls

In with the download files.

Hello :)

I have a question, should I have 3DPrinter before build this one? Actaully I am thinking to make such a thing like this and its going to be my first project

So for printable parts I should have it before build it right?

The Spauda's build guide is the best I have red. Read it and if you feel it's clear enough for you go for it!
For the printed parts you can get it from 3DHubs as Uglybob said, or you can also find sets on Egay.

Thanks a lot. Where can I find it?

The build guide is here in the thing's files

Depends on how comfortable you are with building and running it. You can get someone from 3D Hubs to print the parts for you.

Thanks a lot for your reply.

Well, it will cost more in this case, as I read I found there is previous version of D-Bot, the previous one also need ready printable parts?

May 5, 2017 - Modified May 5, 2017

im having a mare trying to get the motors to function. using ramps 1.4, a4988 stepper drivers, 1.68a motors. ive followed the build guide to the letter but am not having any luck.

i have nothing else wired into the board other than a motor and one stepper driver at the moment. I used the downloadable marlin zip without any luck. im not on the latest marlin and still no luck. anyone?

ive tried tuning the potentiometers and adding the correct calcs for my motors
DEFAULT_AXIS_STEPS_PER_UNIT { 94.3140, 94.3140, 1600, 500 }
DEFAULT_MAX_FEEDRATE { 200, 200, 5, 25 }
DEFAULT_MAX_ACCELERATION { 3000, 3000, 1000, 5000 }

What happened when you tried the downloadable marlin from the Dbot page?

just retried the original download marlin. without any changes to the config. i can control the motors from repetier but again the motors just make loud high pitched noises.

this morning ive successfuly tested board, drivers and motors with this handy test .ino from yogesh patel https://youtu.be/a0zJZ4wZ2j0
i know it all works which is great! but still cant get the motors to be controlled.

did you set the jumpers to 1/16?

hiya. yehah!. thats my problem. i completely forgot to add the jumpers. in the meantime i now know how to configure and use marlin pretty well. and i can get my z motors working from one stepper driver which others said they couldnt.

;) you can't see your glasses if they are on your nose :P
happy building

In the electrical diagram, it shows the power input coming in from the PSU to the 5A terminals, and then the 5A and 11A terminals are connected via a small jumper cable. However, I'm curious what was done differently in the photographs spauda01 provided; which don't seem to be following the diagram.

My curiosity stems from wanting to figure out how to keep the wiring clean like spauda01 is doing in his photos. And just how do you wire up the power to the LED controller without making a mess outside the RAMPS enclosure?

I shorted those pins on the ramps board, I also wired up the LED controller right to the ramps board inside the enclosure

Following instructions and BOM except using a MKS sbase as the controller. Upon hooking it up with power and the bed for the first time, the output voltage of the bed pins was 4V (strange?). Then I turned the bed on and the light on the relay went out, and now the pins constantly output 12V but the bed doesn't heat up anymore.
Can anyone indicate as to what has gone wrong?

Double check relay wiring

I build the 300x300x300 and im getting xy shift. it prints a layer then shifts 5mm and prints the next

Had the same issue, was using Simplify 3d turned out you cant use a Z offset in the settings, it applys it to the x/y movement for some reason.

Anyone are using duetwifi and bltouch? I am having some trouble impelmenting the autobed levelling.

I am using duetwifi and the IR sensor
The best place to ask this question is at

the people who created the board and firmware watch the forum

I am stuck, i cannot get reliable Z motion on this printer at all. It moves down fine always, but lifting up seems to bind.

I have noticed it seems the z frame tilts forward or back when moving up or down. Is there a way to limit this?

I am re-working it now to have it attached at the front and back rails to see if that will help, but any help would be appreciated as i can't seem to get this to move reliably.

Your z wheels are too tight or misaligned

Do you mean the bolt holding the wheel to the mount or the bolts holding the mount to the frame?

Could be either

I tweaked those. Seems to be better. I still get binding, but only at the top 10 mm. Its starting to drive me nuts. I am starting to wonder if there is a defect in my threaded rods that is causing this, cause its fine until the top 10mm :(

I've had this too. It was a pain in the butt to resolve. I basically just moved the motor and rod around until it resolved it. Sometimes stuff just didn't line up correctly. I still get a little squeaking every now and then, which is still annoying.

Had a similar when lowering to the base, turned out one of my aluminium couplers had a off-center hole

I have build this d-bot core xy, based on your guide (great work btw).
So, I connected all the wires according to the diagram and Im pretty sure that it is correct (dont we all say that:) ).
But there was no sign of life when plugged into the usb.
I unplugged everything from the ramp and found out that the z-endstop min. pin is somehow related to my problem. When I trigger the endstop switch, my arduino and ramp turns on.

I have tried to invert the endstop logic in configuration.h without any luck.

Any idea why this is happening?

Hello All. I am having a problem with my extruder stepper motor. Once my hot end gets hot enough and I use the manually feed command on Repetier Host, the filament will feed for a few seconds and then my stepper motor will make clicking noises and wont feed. Then itll start feeding again. I replaced the stepper with a brand new one and that wasn't the problem. Does anyone know what to do??

I've had the same thing happen on mine, the manual feed command is much faster than an actual print feed. Try a sample print

I've gotten it to print many times about two weeks ago. Now every time I try to print anything it clicks.

Motor clicking could be caused by a number of things. I would check:

Is your feed rate calibrated?
Is your hot end getting hot enough?
Is your print head too close to the bed?
Is your bed level?
Is your stepper motor getting enough current?
Is your nozzle damaged?

How would I check the current on the stepper?

If you have a RAMPS board, there is a tutorial here: https://www.youtube.com/watch?v=XU6lgFeZ7ZQ. On a Smoothie board you can set the current in the configuration file.

I have previously done that process. I have the manual feed nob so that I can turn the motor myself, but even when the hotend is completely hot, its still incredibly hard to get filament out. This leads to clicking when I try to print anything. Not sure what the problem is, but I've swapped with 2 other motors and the same problem.

Having the print head set too low can cause clicking. I'd print a one-layer skirt and measure it with a micrometer to be sure.

If that's not it, too much pressure on the extruder adjust screw can cause problems. Not only does it make the motor work harder, the teeth dig in to the filament more and try and push more filament. (I had problems with the printed version and switched to a metal one)

Also, if you have an IR thermometer, check the print head temperature with that. If you have a bad thermocouple or if the wrong one is set in the configuration file your temps might be off.

Hello All. I am having problems after I installed a BLTOUCH sensor. When I do a G28, X and Y home as they should but when it tries to home the Z, it moves about 20-30mm along the X and about 10 mm along the Y and sounds like motors are fighting each other . It then probes the Z.When I look at the commands, it is indicating that it is in the center of the bed but it is not. I have compiled different versions of Marlin as well as Repitier with the same results. I got it to work once by sending M502 followed by M500. It homed X and Y then moved to center of bed and probed Z. but when disconnected and went back in then went back to the old way. I have not been able to get it to home to the center of the bed since. Even repeating the 502 command.I am totally stumped on this and have been fighting this for 2 weeks now.

Did you tried marlin RC8? I set my BLtouch w/ it (following TheLost's advices) and i didn't get any issues. Also what is your
HOMING_FEEDRATE_XY value. If it's too high you might lost steps

Thank You 1sPIRe for the reply. Yes I tried RC8 as well as RC bugfix. Where would I find TheLost's advices? Homing feed rate is HOMING_FEEDRATE_XY (50*60). Not sure what that means, I never touch that so it is default. Can you post or send me your config.h? I can't seam to find anyone else who are using the BLTouch with a D-Bot

I contact TheLost trought private messages, but he already gives some great tips on his own made :

50*60 is the default settings which a good one, actually I set it faster....
I need to take time to share my made and all my setup....

D-Bot Core-XY 3D Printer
by TheLost

Very nice printer =)

I plan to rebuild this version but I want 450x250mm`s for my heatbed. Is this possible? My problem is now, how long should be my offset for the aluminum profiles? Thank you :)

Hi Spauda01,

I am using your provided firmware files and I am trying to enable the LCD display. I used the RAMPS instructions that told me to uncomment the #define ULTRA_LCD line because that best matches my screen (I think) but when I do that I get the following error and it will not compile. I do not want to switch to stock firmware and run the risk of the printer not working because it is, other than the LCD screen.

Thanks for the help and thanks for putting out such an amazing set of files to everyone!

Arduino: 1.8.2 (Windows 10), Board: "Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)"

sketch\temperature.cpp:565:46: warning: extra tokens at end of #ifdef directive



In file included from sketch\language.h:156:0,

             from sketch\ultralcd.cpp:5:

sketch\language_en.h:11:58: warning: initializer-string for array of chars is too long [-fpermissive]



sketch\ultralcd.cpp:36:40: note: in expansion of macro 'WELCOME_MSG'

char lcd_status_message[LCD_WIDTH+1] = WELCOME_MSG;


sketch\ultralcd.cpp: In function 'void lcd_goto_menu(menuFunc_t, uint32_t, bool)':

ultralcd.cpp:194: error: 'encoderPosition' was not declared in this scope

 encoderPosition = encoder;


ultralcd.cpp:195: error: 'lcd_quick_feedback' was not declared in this scope

 if (feedback) lcd_quick_feedback();


exit status 1
'encoderPosition' was not declared in this scope

This version of Marlin is very old, try enabling ultra lcd in this version of the latest Marlin RCBugfix that I customised for the D-Bot. Please stand near by when testing this firmware as I can't test it myself. https://mega.nz/#!tTQVBLhA!iuxwb3OWr7NfPWDjDNxVKCjHYd4t08cq9wOgHcMFnz4


Thank you for sharing your job. Among all 3D printer I look, yours was the best I could imagine to build. Furthermore, you provide a nice documentation (build and BOM with link to the provider)

For me, this core xy type with an optimized Z bench looks so sexy ;).

I have ordered all parts I need to build mine in the 300x300 version. I live in France so I review all your BOM to avoir taxes. I will release it when I finish to include all links.

Soon a new D-bot will born

Can someone give me a rough idea of the time taken to print the parts and the required length of filament?

I am weighing up buying the printed parts off ebay or asking a friend or two to print them for me. Time isn't critical, but cost is more of a factor.

It takes about a 1kg spool to print all parts at around 95% infill, get two spools for extras and possible messups

I have so far an anet A8.
Im thinking about to build this Printer. But is it better than a Anet A8?
My Anet is a little bit loud and i dont like the unstable design type.
and can i use a MK3 Hotbed with the dimensions 214mmx214mmx3mm

That seems like kind of a small bed and not really worth the cost of building this size of a printer but it would work

Hm okay
The Problem is have already a Mk3 Hotbed. So i dont have to buy a new one. Do you think this printer is better than the anet a8

I can get 50 micron precision from my Anet A8 with a few mods so you really aren't limited in terms of print quality but the build area will be larger if you go with the 300mm bed. In terms of loudness going with 1/32 micro stepping driver like those in a Smoothieboard or Ramps 1.4 might help, that's what I would go with if you decide to go ahead with this build, or even to upgrade your A8.

I've never used an a8. Pose the question to reddit.com/r/3dprinting

Okay Thank you :)

Has anyone here had any issue with movement/ homing any of your axis? Whenever I do so I just get a high pitched whining and no movement. I'm using the firmware that Spauda01 provided

Your motors could be wired wrong. Or your stepper drivers could be damaged or configured with the wrong microsteps.

You are a genius! Thank you! My stepper drivers were in full step mode, I just had to set them to 1/16th step.

haha thanks :) glad I could help.

Checked the motors, they're wired correctly. My driver's aren't damaged I've checked them. However, I have not checked for microsteps. How would one go about doing that?

Hi all.
My lead screws arrived today and one of them bends slightly towards the top. Assuming that I'm using all of the standard parts and the E3d V6 hotend, how much distance is there between the top of the 400 mm lead screw and the bed when the bed is at it's highest point? (e.g. without passing through the nozzle)

Can somebody answer this question please? I only need a measurement from somebody who has this printer.

Varies wildly basing on hotend model, carriage choosing, and overall building inaccuracies.

Impressive. Looks like the perfect diy 3d considering the total cost.
My question is if someone did a project with a 400x400x400 as I was considering that might worth to build the definitive 3d in case any time I want to print something bigger as the usual parts.
In that case, I'd appreciate some details to consider to don't make a mistake during building.

Can someone post their default speed incl. nozzle size and layer height.

I suspect my issues with high speeds are related to throughput through my clone hotend.

Original E3D V6 (0.4mm nozzle), from 40 to 60mm/s depending on print, 0.2mm layers. Slow but gold.

Thanks, I'm struggling to get above 30mm/s due to weak extrusion - but I might be happy with that for now.

Also I noticed that print speed through repetier host usb is like 3x faster. 10mm/s CURA slice run through repetier = 30mm/s through SD card. Probably some interface issue.

Apr 10, 2017 - Modified Apr 10, 2017

Has anyone attempted a cheap enclosure for this build?

I put together the IKEA Stuva/Besta combination (below)for my Prusa i3 but I think it'll be too short for the standard sized d-bot. If I ever upgrade to the 300x300 version then this enclosure definitely won't work.
looking through the comments, enclosures are breifly mentioned, but nothing I can use.
Does anybody have any ideas?


You could use this with two doors but you still won't fit a 300x300 d-bot

Yeh I saw that. It looks awesome!
But it also looks very difficult and without adding some seals, it won't contain the fumes.
Great design though!

I have a 3D printer enclosure for my OrdBot that is not 100% sealed, and it works pretty good, no bad smells, not even from ABS, the enclosure works is by using a computer fan to suck the bad air out of the 3D printer enclosure and blow the bad air into dryer vent hose connected to a dryer vent installed into the wall of my house, all the bad air goes outside, the only problem I have is air coming in around the unsealed 3D printer enclosure door sometimes causing warped parts with ABS or PETG, I have been thinking about sealing the door and installing a air vent under the 3D printer so that fresh air comes into the 3D printer enclosure from underneath the 3D printer and bad air exits from the top of the enclosure.

Have a look:

Thanks :) I might look at doing something similar.

Hey Spauda01,

Great build. Just finished and working on tuning for my first print. The bed seems to rock a bit and when trying to level the bed seems to have give on the wheels / vslot. Basically if it goes up 1mm it tilts up before moving, down, tilts down.

Do you have any insight into how to tune the bed or tighten the wheels on the vslot so there isn't as much play?

Thank you!

I've been combatting this exact problem for a while and I think I am getting it under control. First of all, make sure all the relevant parts (the wheel holders, and all the brackets for the bed) have all of the hardware they require and that they are all secured tightly. I know that seems like basic advice but I've noticed the issue is very sensitive to this.

Another thing which may or may not be relevant to your setup: The back rail for the bed setup on my build was a bit too short, so I had to have the wheel holders make up for the difference. Make sure all four of them are parallel both with the linear rail they grip AND each other. For good measure, I made sure the wheel setups were the same distance away from the linear rail on either side.

I could be wrong, but I believe this issue makes z-homing inconsistent which makes leveling a nightmare. Now that I have it sorted out my D-bot is finally producing parts reliably. Good luck!

Hey Spauda01,

Just finished building this printer but having an issue on the Y- axis and was after your help.
Everything else seems to be running fine and i've had a look at marlin but i cant see any issues with it so far. It's all new to me so maybe i am just missing something.
X - axis homes normal
Z - axis homes normal
Y - axis homes in the right direction to the limit switch and looks ok until it hits the switch, it will then run along the X- axis to the centre of the bed and will shake on that spot for about one second and stop. It's like the two motors fight against each other at that point. Before it hits the switch though it is smooth and runs straight on X and Y and i'm pretty certain its all wired up ok. I noticed on Repetier the Y axis moves off the switch in negative direction to -200 and will move back to limit switch using positive to 200.

Any help would be appreciated if you have an idea about what is going on.

Thank you

Double check where you connected the endstops to the control board pins, you might have it on a min instead of max pin

Thank you for your help.

you are correct. i had it on the MIN endstop for the Y - axis.
Works fine now!


If I use borosilicate glass on top of a 4mm aluminium plate for the heat bed, does that plate still need a flatness of 0.1mm or better? And does the plate need to be anodized? I have the plate and can drill it myself but each edge bends down from the middle by roughly 0.5mm.
I have a quote for a 5mm thick 215x315mm aluminium tooling plate with 4x M3 holes drilled, 0.1mm flatness or better, and anodized for USD$90 (~AUD$120). But I'd prefer to use the plate I have if it's usable.
Any help would be greatly appreciated.

I use plain window glass on a pcb bed and its perfectly flat for me, I wouldn't worry about it, and I certainly wouldn't spend that much on a bed

How long does your bed take to get to 110°C for ABS?

My bed cant get that hot

.1mm flatness does not seem flat enough. Try here for a cast plate..https://www.midweststeelsupply.com/store/castaluminumplateatp5

After asking around a few machine shops, it turns out that casting plate isn't a thing in Australia. If I buy from elsewhere the shipping would be insane.

Apr 10, 2017 - Modified Apr 10, 2017
Cyrrus - in reply to Digger60

I'll have to find an Australian equivalent to get the shipping down (assuming they even ship to Australia)

Hello, Congratulations on your project!
I wonder if in some file, blog or place you list the version updates.

I intend to build this project, updating it with your improvements. But I could not find a document that lists the updates, which makes it difficult to know what corrections were applied to the project.

Everything in the downloads section is up to date, if you've seen other add ons then those are remixes done by other people

Thanks for the feedback.

The most up-to-date I have checked out is March this year. The project has existed since Sep 6, 2015.

I think maybe 6 months ago you improve something, update the documents and I, who would do the project now, would not know what the improvements were, making it difficult to update my 3d printer.

No hardware changes, just updating small things in the build guide and parts list

Thanks for the reply!

Anyone have advice on how to align the Z axis Threaded rods? I think mine are binding. I get noise out of the Z Motors, but no movement. I have tried different voltages and nothing. I have moved things around, and i did at one point have it move down successfully, but never up. Any hints on how to get this alignment correct?

JQE - in reply to JQE

Starting to wonder if its an alignment issue at all, or if its something else. I get a buzzing in the motor, but no movement. I have tried everything i can think of. Increasing step power, decreasing it. Aligning everything. Even so far as to use a level to do it.
I am at a complete loss.

Check your wiring with a OHM meter. I had one wire in my connection break, that causes buzzing

You just need to move the bed all the way down, then adjust the motor mounts so that the lead screws are centered on the lead screw nuts, there is detail in the build guide

ok i got this done, now it goes down no problem, however it doesn't seem to be able to life the print bed :( not sure what i am missing.

JQE - in reply to JQE

Changed the stepper driver. Seems to be working now.

You know i read that page like 100 times, and yet never registered the move it to the bottom statement. Thanks for the pointer. I will let you know how it goes.

Details are always so important.

Anyone can share a duet wifi firmware for this printer? ( 300x300)

I created a ReMix with my Duet WIF config and Case design

DuetWIFI Config and Case For 300 X 300

thank you very much I' check it out!

I would love to get a copy of this also.

I have followed the wiring diagram and double checked everything. when I plugged in my board to usb it turned on when I switched the psu on the arduino started to smoke so i shut it off, I bought a new mega board and the same thing happened. any advise?

A couple things come to mind. 1) If you got the RAMPS 1.4 board from Aliexpress, Ebay, etc. do a thorough check on it. Mine had a couple solder balls that were loose and shorting 2 pins. Luckily I check it before applying power. 2) Make sure you have the motor controllers in the correct orientation. 3) disconnect the arduino/ramps from the PSU and make sure it has the correct voltage. There should be a little potentiometer on the PSU you can use to dial in the correct voltage if it is off.

I have done all of that

What got updated in the build guide?

New switch picture at the very end, updated some broken links

I'm not sure where to right place to post this comment is but would anyone be willing to help me out by selling me the printed parts? It's not worth fixing my old printer just to print them.
I found this seller but the parts are printed in PLA and priced very high when considering shipping to Australia (WA).

G'day mate! Are you still looking for someone to print parts for you? If so, shoot me a message. I'm in Sydney and can help you out.

Ahh this would have been so helpful if I'd seen this message before buying them off ebay. As far as Thebrakshow's comment below goes, I did try fix my old printer but wasn't successful. There will definitely be other parts that I need printed before this build is working so I'll hit you up :) Thanks man.

Honestly 110 USD isn't too bad of a price. There are a lot of parts for this printer. It took me like 2 weeks of print time to complete it. Granted I was printing slow so I could get quality prints but still. You should consider fixing your old printer with the parts needed for the D-bot. For instance, if your hot end is clogged to all hell, buy the E3D and install it on your current printer to get it printing. Same could be said with the logic board, power supply, lead screws etc. Once you have all the D-bot parts printed, remove the borrowed parts and build your D-Bot. I will say it was very helpful having a 3d printer up and running while building the D-Bot. I somehow managed to break the extruder bracket and needed to reprint it. Plus having multiple printers is awesome! :D

Does anyone know how far the corners go into the side rails? I have some 400mm linear rail and was thinking of doing the 300mm build but wasn't sure if it would fit on the sides? Basically the build sheet lists the side rails at 448mm (for the 300mm bed) but I was wondering how much of that is taken up by the corner pieces?

is there a BOM for quantity's of parts I need to print to build this D-bot?

thank you.

The file names of the individual parts start with a number indicating how many of that part need to be printed.

awesome, thank you.

Does anyone use Simplify 3D with there D-Bot? So yes, pleaseeee share me ur print settings...

I use Simplify 3D what settings are you needing?

Can you import de ff settings to me? i need everything :)

Can you share Your arduino code for Your 3D printer? I am working on creating one myself With 400 stepper motors.

its all on the downloads page

I am making mine in Purple color :)

WoW 90 Made so-far.

Can this be modify for dual end extrudes?

Hi All. I have built the D-bot and it works great. However I am trying to install A BLtouch sensor and have run into an issue. When I turn every thing on, I get a red light and BLtouch pin is retracted. when I try to home z axis nothing happens. I can use jog controls and z moves. I can home X and Y and they work fine. I can issue the pin in and pin out commands as well as the continuous test and BLtouch does as it is supposed to? So what am I missing with the Homing of the Z axis?


1- I need help with the bowden system. The filament sometimes is not push enough and don't exit from the extruder !!!
2 - Hox do you make the connector to hold just above the extruder motor. I try to attach it, but it seems to work only when it wants !!!
3 - Has someone a direct carriage for the extrudeur ???

Thank you

I've read the build guide and bill of materials, but I can't seem to find what wire gauge should be used from the power supply to the SSR, SSR to heated bed, power supply to the RAMPS board and from the ramps board to the hot end. Could someone please tell me what the official specifications are, or if there aren't any, could you please tell me what gauge you used.


14awg between psu, bed, and ramps, 22awg for everything else including hot end, motors, endstops. all stranded wire


Hi, Anyone having issues with inconsistent Z moves? I'm running smoothieware on an MKS Sbase 1.3 and am struggling to get rid of Z lines. The printer is perfect in every other way.

someone has configuration.h for leveling with inductive sensor?
thank you

same here.
I have another pb. I order a first bed 300x200 (link in the bom). It arrived not flat at all.
I contacted and sent pictures to the seller. He sent me another one. Same issue.
Even with a glass on it, it still not flat.
For yet I will put the 200x200 mk3 bed ...

First time builder, long time geek-er.

I'm about 90% done with my Corexy Dbot but im having issues with the Zstage.
I made 2 changes to the system. I upgraded to the Stepper motors to 84oz/in instead of the 72. and im using 24v for the whole system including the bed and hot end.

Im just wondering if you had any tips for tuning the ZMotors. They buzz and bind up every time. Ive aligned and realigned a few times with the same result. any ideas?


Check your current, sounds like it's to high.

Just a question about homing : What is the normal move of x carriage and Y carriage ?

If I move x axis from 0 to 80 it goes right (when your in front of the machine)
If I move y axis from 0 to 80 it goes from rear to front.

The endstop X is for min and Y too ?

X min Y max Z min. Homing order is X,Y,Z

Thank you. After inversing motors wires it's now ok.
I got a pb with the Z platform.
Sometime it does up or down. I hear motors, but nothing happen ...
I think I must find where exactly to screw the rod. (I do the 300x300)

If some one has the length, and can share.
I will go to the original z carriage. I had printed the 3 whgeeled version, but I don't like it.

Now, other question : I solered the power button and wired the alim.
Is it normal that button off, it remains 220V between L and G on the alim connectors ? (alim is still off).
If I switch on the power button, the alim switch on and switch on the ramps.

When I soldered the button, does it have to cut the L or the N ?

Switch should cut L

What is alim?

Read page 1 of the build guide

Sorry, I used the french word ... Alim(alimentation) is power supply.

Mar 16, 2017 - Modified Mar 16, 2017

Another question, what is the purpose of the SSR ? does it heat the bed more quickly ?

2) I got a pb with the ptfe tube. How do I remove it from the big part ? I pull or push the black ring it does nothing ...


Thank you

2) Push on the ring and pull on the tube

Simply put, a solid state relay is like an electronically controlled switch. Think of it as a beefed-up version of the Mosfets on the Ramps board that send electricity to the hot-end. A 5v logic signal from the arduino is sent to the mosfet, and in turn the mosfet allows for 12v to flow to the hotend. The same theory applies with a SSR, however, instead of sending 12V to the hotend (or in this case heated bed) the SSR can deliver 120V (mains power right from your wall). Yes it will heat the bed more quickly BUT ONLY if you have a 120V heated bed. If you have a standard 12V PCB heated bed you will break it by wiring it to a SSR using mains power. The advantages of using a SSR are twofold. The first is that for two beds with equivalent power ratings (watts) the one using the SSR will draw significantly less amperage than the one driven from the mosfets on the ramps board, and you won't have to worry as much about your wires heating up. The second is that the power that is used to heat the bed doesn't come from the printer's power supply, but instead right from the wall. The power supply listed in the BOM will struggle to get your bed very hot if it has to run a large heated bed, considering it also has to supply power to all of the stepper motors and the hotend in the printer. Please make sure if you do get a SSR that you are comfortable working with mains power as you will have to supply 120V right to the relay. WIRE YOUR PRINTER FRAME TO THE PROTECTIVE EARTH RAIL ON YOUR POWER SUPPLY IF YOU DO THIS!

You should be able to either press or pull on the plastic rings opposite the threads shown in the photo and then pull the teflon tube out. Sometimes this can be hard because the teflon is very slippery. I would advise against using pliers to pull on the tubing as it is quite easy to crush it slightly, which will make it harder for filament to pass through and could cause your extruder to jam. Worst case just cut a little bit off right where it comes out of the fitting and push the small bit through the fitting to get rid of it. Don't install the tubing until you are at the very end of the process then.

Please do not suggest that people use a 120v heated bed. Also that is not how the SSR is being used on this printer

The bed is in 12v as in the BOM of spauda01. So here, what's the purpose of the ssr ? Making the arduino to heat less ?

The current needed to power the heated beat at 12V can exceed the current rating of the cheap terminal connectors on the Ramps board. Its to prevent the current from going into the Ramps 1.4 board and damaging the terrible cheap Chinese connectors. With the SSR, the current goes from the power supply, through the SSR, to the heated bed. Without the SSR, the current would go from the power supply to the ramps 1.4 board, through the ramps bed connector, to the heated bead.

Hi,,I got a question : I'm trying to adjust the two belts.
But, when the belts are in place, the rail which support the extruder is no more parallel to the back v-slot !!
If I try to tigh less, the belt don't make the bar move smoothly...

What do I wrong ?

A good way to get the crossbar into the right position is to move it all the way to it's rear position and then tightly tie each end to the rear crossbeam. You can also accomplish this using c-clamps or by having another person hold the bar tightly in place. Once it's clamped/tied in place tighten the belts as much as you can since they are so long, and only once the belts are tight release the clamps. This will make your arm be perfectly square in all positions. :)

I just give a try to a prototype of adjustable belt tensionner, and it fix the issue you are facing. I will share it once I will have finish my built. So your probleme might be because one of your 2 belts is more tensionned than the other. try to release one or tension more the other one.

Mar 16, 2017 - Modified Mar 16, 2017
davidmarli - in reply to 1sPiRe

Thank you. Indeed, releasing a bit on the first belt, and tighting the other a bit more is perfect ...

I am hoping someone might have some advice for me. I got everything assembled pretty much, however i am noticing that the Extruder mount doesn't move smoothly, the rest of the moving parts are perfect, but the extruder mount is very hard to move. I don't see any way to adjust the tension on that mount, as uses the top and bottom, any suggestions on how i can work with that mount to get it moving better?

JQE - in reply to JQE

I think i may see something, it looks like the bottom holes are longer, to allow for up and down movement. I will see if i can get them to move down slightly to give more freedom of motion.

Make sure you don't overtighten the locknuts that are used to hold the M5 screws that clamp the carriage together. Overtightening these will cause the bearings inside the delrin v-wheels to bind and become stuck. In addition to this the bottom holes are not only elongated like you pointed out but they are also finished off with a wedge that forces the bolts to move closer to the aluminum extrusion. I found that if I relied on letting the tightening move the bolts into the snug position they would become overtightened and bind. Try getting the two top wheels to a good tightness (to where anymore torque on the locknut will cause binding) and then try to replicate this torque on the bottom bolts. Once you've done this with the bottom bolts squeeze the bottom bolts up towards the top ones in order to snug them up against the extrusion. Verify a good fit by trying to rotate the carriage about the y-axis. If you have done this properly there should be no play for this.

I have built everything by the book and I currently at the programming phase of the build. I've inputted everything number by number from the guide yet when I try to move the x,y and z nothing happens at all. Well there is something that happens and that is on the z-axis motors and there is a loud buzzing noise but they do not move. Non of my motors move but those are the only two that make sounds. I've adjusted the voltage from the little steppers turning them every which way but still nothing, the buzzing on z-axis only decreases slightly.

Anyone else have this problem that could help? Thank you.

Make sure that the 4-pin connectors that are on the stepper leads are wired properly. There are a lot of different color codes used for stepper motors but one sure-fire way to find out which two cables are connected to the same coil is to connect two of the cables together and spin the spindle of the motor. If when you spin the shaft you notice resistance to the motion, that means the two wires you are holding together are part of the same coil. The two wires corresponding to the same coil will likely be labeled A1 & A2 or B1 & B2 in the wiring diagram, so ensure that the wires are hooked up properly on your board. Motors with improperly wired leads will just whine and shake a little bit.

Curious. If you haven't yet, join the Facebook D-Bot group. Plenty of people in there to help out.
I assume Power Supply running proper voltage? 3 Jumpers are placed under each Stepper Driver? Using Spauda01's Marlin coding?

Searched the comments, nothing of value:
So ive been using this printer for the last + 8 Months(Thanks very much spauda)
anyway, ive always dealt with it but i plan on building a couple for friends soon. heres my problem:
When i home, I have to home the X and Y, then move the X off the endstop(1mm does it) then it will home the Z axis, if I do not move the X axis, then the Z will go the opposite way maybe 5MM and stop, it will not home.
Also is there any firmware updates?
Thanks for the guide again spauda!

Check Marlin to see if you are using the safe home feature for the z-axis. If this is enabled it only allows for homing of the z-axis when the carriage is at a specific coordinate point in the XY planes. This is useful for printers with inductive probes as it ensures that the probe will always be above a point where there is sure to be metal that it can sense underneath. I'm not confident that this will solve the problem but it might be a good place to start looking.

I've been using the Marlin 1.1.0 rc8 for D-Bot (Posted in Remixes for D-Bot here on thingiverse)
I see no change in my printer. So if it fixes or helps out over the original D-Bot Marlin I can't really say.

Mar 8, 2017 - Modified Mar 8, 2017

I'm finally building this printer. I'm looking at this for a 300mmx300mm bed and found this. https://www.midweststeelsupply.com/store/castaluminumplateatp5 and perhaps https://www.amazon.com/approx-KEENOVO-Universal-Flexible-Silicone/dp/B00V81ZI70 this heater to heat it. Do you think this will work good ? Any help would be great !!

Thanks so much for all the work you have done for us on this printer !


Mar 8, 2017 - Modified Mar 8, 2017
Wnelson_MTU - in reply to Digger60

Hey Tom,

I wrote out a very long and thoughtful response to this comment as I have also built a D-bot using the same aluminum cast plate. I said hot as he** when talking about the heater pad and it has been flagged for moderation.... :( I won't rewrite everything but long story short.

-Quality of the plate is great, very flat and aluminum is imo the best build surface, just slap on some gluestick and you're ready to go
-The plate is heavy, sometimes on long travel moves (not while printing) this causes one z-motor to miss steps while the other still moves, tilting the plate out of whack.
-You will NEED an inductive sensor to help with this
-Also I would recommend doing the mod that I have seen some other people do where they connect the two z-motors with a belt, should help alleviate the problem. Once you've done that this will be rock solid. If you don't do this prepare to endlessly tinker with the z-leadscrews like me :(
-750W might be overkill for the heater depending on how patient you are, I use a 500W pad and it gets hot as he** :) (10 min to get to 130C)

Thanks for the quick response ! I'm looking at getting the 1/4 inch plate. How many oz is your motors ? Wonder if I got a stronger motor for the z axis ? Do you happen to remember the link for the guy running the belt off two motors ?

Thanks again


Hello Tom,

My motors are 68 oz-in as advertised on Sparkfun. Here is the link https://www.sparkfun.com/search/results?term=NEMA+17
To the best of my knowledge this is about the top limit for these motors in terms of torque, that is unless you want to use a longer frame size. Motors like these (60mm length as opposed 47mm for the normal) are available but are not easy to find in the 400 steps/revolution version, which I recommend unless you are getting nicer stepper drivers that can handle smaller micro stepping than the ones in the BOM for the D-Bot. Prints with these motors are super crisp and pretty fast. Make sure if you do go for a longer stepper motor that the drivers you have will be able to be able to supply ample current to them. You won't get any extra power from the motors unless you can crank up your drivers as well. A good place to look up this information is on Pololu's website about drivers. https://www.pololu.com/product/2971.

Here is a link to one of the D-bots that uses the z-axis belt coupling system
Not sure if the design files are posted or not but it looks pretty simple to replicate

Good luck with the project!

D-Bot Core-XY 3D Printer
by Eberleg

Thanks, I will look into it. Here is the link that he has in his build...http://www.automationtechnologiesinc.com/products-page/3d-printer/nema17-stepper-motor-kl17h247-150-4a-for-3d-printer its a 76oz. I have seen 89oz on amazon. Have to check out the diver into to use them.



Mar 8, 2017 - Modified Mar 8, 2017
Wnelson_MTU - in reply to Digger60

Hey Tom,

I made myself a D-bot over the last semester at school using the very same aluminum cast plate from midweststeelsupply. It works so-so. The surface is very flat and aluminum is a good heat conductor and easy to work with, so all in all it should make a perfect heated bed. That being said the plate I used is 1/4" thick and the mass that it adds to the z-axis assembly is pretty significant. With the 1/4" plate I have to run my stepper drivers HOT! Good cooling on the board is necessary if you decide to go this route, I have an enclosure around my electronics with a fan blowing air through and would definitely not want to print without it using this setup. Even with the drivers running at max capacity I have some issues with the surface un-leveling itself (one motor will skip steps but the other will not) when raising the platform a large amount (over 70mm or so), which, to say the least is a pain.... You will have to try really hard to get the z-axis leadscrews aligned properly without binding. The printer works well once the first layer is done, but even if you are using an inductive sensor (you will NEEEEED it with this bed) be prepared to tinker with the bed if using a 1/4" plate. Many people have added a belt that connects the two z-motors so that they cannot become desynchronized. I have been meaning to do this for a while but I haven't yet so I can't attest to how it will actually work, but I'm pretty confident that this is the best theoretical solution, and that by adding it you will get great results. Without that addition I would rate the setup overall as a 6/10. With the belt connector I would imagine it being a 10/10. Moving onto the other link, the heater pad you picked will work great! You could even go with a little less power. I am using a 500W pad and it gets this thing hotter than hell. Over 120C easy. Takes about 8 minutes or so to get to 85 (which I use for PETG) but I run a lot of long prints so it doesn't cost me too much in overall efficiency. If you do go with a plate and heater make sure that the thermistor is installed in the middle of the cast plate underneath the heating pad. This is acheived easily by drilling a small hole (only halfway through!!!) and then using thermal cement or muffler compound to secure the thermistor then laying the pad down over the top. Also if you run this a lot prepare for the room it's stored in to be about 10 degrees hotter than the rest of your house. If you have any other questions reply again and I can share pictures or other insights.


I ordered a 5050 led strip with ir. Where do I find the led controller board ?

I am doing this for a school projects but appatently i need a power supply that is Australian complient and is double insulated which the one in the design isn't. So far the only solution i can think of is using a Desk top power supply in a compact PC case (Which i have been told is allowed) but im not sure how i would wire anything.
Does anyone have any solutions for power supplies or wireing diagrams i could follow for a Desk top power supply?

Mar 6, 2017 - Modified Mar 6, 2017
Thebrakshow - in reply to Salesian

Good luck...You wont find a class 2 power supply in the power range you need for under $250... You will most likely have to get 2 supplies, one for the bed alone( I would suggest a 24V supply, heated bed takes ~130watts!!), and one for the rest of the electronics (12V). I would look into Meanwell or Sparklepower FSP. They have class 2 supplies with a IEC230-C8 plug. I know sparkle has RCM (previously C-tick) certs on some of the supplies but you might have inquire as to which ones actually have it.

Mar 4, 2017 - Modified Mar 4, 2017

Trying to get Auto bed leveling with a probe. I have the probe working as my Z min. However when I do a G28 X homes. Y homes. But the Z doesn't home in the center like it should I have safe homing enabled.
Here is my config file.

If I reverse my X and Y and make my Y end stop a min. It works as it should. But then everything prints backwards. I would rather keep things stock in regards to motion.

Anyone besides me having their z axis motors making a high pitch noise and not moving? I swapped the connectors and even took the z screws off.

Mine does the same as long as it's engaged

I just finished my build and rubbing the initial testing phase and I can't get anything out-of ANY motors but the z-axis ones are the only one making a noise.

because the display 12864 does not work with the d-bot firmware?

I believe you have to uncomment #define REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER in Configurations.h and install the U8glib library in your Arduino environment. You will need to recompile the code with the changes and upload it to the Arduino mega board.

Ok perfect
thank you very much

Can someone who uses a Chimera tell me how they set it up in the software and how they have their secondary extruder wired and set up as well. Please and thank you.

I have to say I love this machine. I've been running mine constantly for months now and it's been extremely reliable. Far from perfect, my printer is using some slightly damaged parts(I cracked from over-tightening), a few things I know I should replace due to wear and tear(from previous use) and it still performs admirably.

One of my favorite prints so far was a purple PLA knight statue I believe I posted a picture of in my profile here. It was huge and looks nearly flawless. I would only wish to make it again, larger, for more detail!

I am planning to modify mine to increase robustness and add new functionality, such as heated enclosure, filtered air, and making the build platform larger(which the frame was built for, but I never got around to installing a larger bed) and making the platform more rigid.

I'm currently printing parts for a "mostly printed cnc"!


Thanks again for not only providing the build guide, but putting all the hard work into designing, updating, and communicating with the community on improvements and changes!

If you want an enclosed printer check out the Ebot remix

Thanks, I'll look into it!

Feb 26, 2017 - Modified Feb 26, 2017

Can i use Solid wire from power supply to ramps? and to ssr. everything else stranded wire?

wouldnt recommend it

Mounting coming to the end ... but before I assemble the belts, the extruder moved really freely and without force, now with the belts properly stretched, I find that the extruder is really hard to move ... is it normal ??? Or I have to look for a problem ??

Avant que je monte les courroies, l'extrudeur bougeais vraiment librement et sans forcer, maintenant avec les courroies correctement tendues, je trouve que l'extrudeur est vraiment dur a bouger ... c'est normal ??? ou je dois chercher un probleme

The carriage will be considerably harder to move after the belts are installed because you are then moving both belts and motors at the same time with the added tension from the belts going around the motors and idlers. I don't have number or percentage of increased force because I didn't measure these. I just started with some short movement commands after assembly to check strain on the motors and freedom of movement overall.

Thank you for your message ... so ... I continue !

Thanks ysdhnm

The command "pip install -r requirements.txt" gives me "no such option:

I checked my /usr/share folder and there is no file Printrun or Pronterface

Still no joy in Mudville

Would I be correct in assuming that the measurements listed for the bed carriage holder/spacing are not for a 300x300 bed? Looks like I have to extend the arms a few mm. The other problem I am seeing is the the z motor holders won't extend further to accommodate the larger bed as there hitting up against the 2x2 that's holding the rail. Anyone else have this issue and did you just cut it to extend it?

At the end of the Build Document are the cuts for a 300x300 build. I used them and have not had any issues with it.

Thanks for the reply, I followed the 300x300 build cuts, I ended up having to use dremel to cut a small square out the 2x2 and a pc off the lower 3x3 to allow the zaxis motor holder to move far enough over to be in line and not bending the zrod. Ive tipple checked all my measurements so the bed is centered not sure why I needed to do that but it works and hasn't had any other trouble during the build.

I also had to do the same. I designed a 2x2 with a notch out of it so the motors can be pushed out further towards the ends.

2x1 Plate Cut out
by jskala

perfect, super clean design, love it!

I'm having the same problem as you. They are both pushed out to the max

Has anyone setup Ponterface on Ubuntu 1604?

Just going around in circles - tried different suggestions from google searches

I had issues with Linux mint but not Infront of my computer. Here are some things you can try in the pronterface dir.

sudo apt-get install python-serial python-wxgtk3.0 python-pyglet python-numpy cython python-libxml2 python-gobject python-dbus python-psutil python-cairosvg git

pip install -r requirements.txt
sudo pip install Cython
python setup.py build_ext --inplace
sudo apt-get install python-psutil

Anyone using S3D can you maybe share your settings that you have working well with a Bowden setup. I have it working but I am getting a ton of bumps and pimples on prints.

Feb 22, 2017 - Modified Feb 22, 2017

Does anybody tried to build all with T-Slot extrusion? I dont mean changing wheels to rails. I am not sure but openbuild mini v-wheels is looking fine with T-Slot extrusion.

Could you explain the usefulness of the relay in this project?

Feb 22, 2017 - Modified Feb 23, 2017

I made a 300x300 version , I am using an mk2 heated bed 328x328 mm real dimensions.
Now I have problem fitting the 3 holes plate because the motor mount limit the space on the side.
I don't have problem modifying the motor mount but I would like to know if it is only me with this problem , is it possible that I made some problem during assembling?


Yes I had the same problem,
I modified the motor mount (removed one of the rabbit ears) and replaced the bottom 3X3_Plate with 2X1_plate that attaches to the bottom for the 20X20 motor bar.
you need both on one side to get enough room.

That gave enough room

Thank you for your replay , I am planning to use a "one Z axis motor mount" solution so I will not have this problem anymore but thank you for your feedback now I know I that I didn't make mistakes assembling the printer

I plan on using the Keenovo 300 X 300mm 120V 750W Silicone Heater Pad and was wondering how to set it up. How can I control it with the raps 1.4 board? Also since this heat pad is being powered separately from the board can I get a smaller power supply since now the board is now only powering the hotend and motors now?

I was having some simular concerns with my bed too, it's a big bed so I wanted a sperate power supply. This is all new to me so I didn't fully understand how all the powering worked. But I read a lot of comments and did some research and really looked at the wiring diagram. I too thought that the board controlled the heat bed but that's not actually the case. The heat bed is powered strictly from the Power Supply Unit. Now what the board does is actually control the relay which acts as a switch. If the bed needs to be heated up the board flips the switch and let's power run to the bed by means of the relay. So really all you need to do is get a relay that can handle your new Power Supply Unit.

I hope this makes since, as I said I'm still learning and others please correct me if I am wrong in what I'm saying.

Helps a lot. I understand it now. Thanks a lot. You need a 120v relay though right?

Yes. But from what I can tell a lot of them can handle a wide range of voltage, it's the AC/DC conversion you need to get right. Just make sure it can handle your input and the correct output.

You sound like you don't know what you're doing which is dangerous. Use a DC bed.

I know how to wire and solder and everything, I am just confused how to use the ramps to control it with the heat bed not using the ramps board to power it.

If you arent really arent going to help dont comment.

Look at the wiring diagram. The dc bed isnt powered off the ramps either and it is still controlled by it.

Yes but I think 12 volts is still running through it and to the board and i cant do that with a 120 volts. I might be wrong there

I wasn't trying to be rude when I said before that it sounds like you don't know what you're doing. I'm genuinely concerned for your safety if you attempt 120V AC wiring and don't know what you're doing.

This is probably a stupid question but what is the solid state relay exactly doing?

It switches the heated bed. Being it a heavy load (a 200x300mm heater can pull quite some power...) a MOSFET or other relay may not be sufficient, hence the SSR.

Hello. And where to get the details for the project in the format solidvorks? Sorry for my english

Hey guys, I have some misumi profiles laying around, is it posible to use them for the parts that does not need to have wheels on them and only buy the v-slot for xyz?

Hello, does great value dimension stepper motors? The bill of materials specified 76 mm motor ( order it is problematic), but Ali has mainly 42 mm ... Thank you

Wow! what a sweet design! I've ordered my rail for a 300x300! Most comprehensive build guide I've ever seen on an open source project. KUDOS to you sir. It looks like some folks are having trouble cutting and tapping the rails, I'm willing to help cut/tap/cleanup rails pretty expensively here in Auburn, WA. if anybody is looking for help. Just send a message my way and we can work something out.

I would like to use a single Z axis motor, anyone use this solution?

Parts for Adding Third Z Screw to D-Bot
Feb 16, 2017 - Modified Feb 16, 2017

I am building mine to the 300x300 dimensions, i've purchased everything except for the heat bed, build plate and the hot end. I've already started assembly on it and as I'm looking for heated beds I am having difficulty finding any that fit the PSU, can anyone sugguest a heated bed or perhaps a better PSU?

Thank you very much.

1200w hp server psu amazone 32.00$
makerfarm 12v 12x12 approx $70
still need something to support the bed
I looked into that
probably about 40 for aluminum sheet from mcmastercarr

i found an aluminum plate on Ebay thats perfect.
Do you have that PSU running the whole printer are just the heat bed?

I am still waiting on the psu. so I am currently using a 300w psu to trouble shoot stepper motors. My gantry is not moving correctly and my z steppers are getting very hot. I think my screws need to be realigned.

I will be running the everything for the printer from the 1200w 12v hp psu.

Can you provide a link to the aluminum plate? Have you recieved it and it has holes or is at least flat?

I lost a set of bearings so I haven't been able to complete the set up to even test anything out. I was thinking about just using the PSU I have and just get another one just like it to run the bed.


This is the plate that I am going to buy. I haven't bought it yet, been waiting on pay day, but that is Thursday so I should have it in next week. I will let you know how it all fits together when i get it though. Its made in the USA so I can only assume it will be good quality, that's why Im going with this one and not some china one.

Feb 18, 2017 - Modified Feb 21, 2017
C7_Vette - in reply to thejordonian

I went through a few heat beds before finally settling on the KEENOVO Silicone Heater. It is AC powered and I used a SSR-25DA to control it. I added an addition fused switch (15amp) adjacent to the switch that powers the rest of the printer. No power supply needed with this setup and I simply grounded it to the printer frame. I used a heavy duty 14AWG 15amp power supply cable for this plug. In my opinion this is the best option with large beds. The silicone pad will need to be mounted under an aluminum plate. Mine heats up to 110°C in less than 3 minutes. I found that 12v DC beds this size just could not heat up enough, no matter how long I waited, even with a dedicated power supply.

I was looking at ssr's for this setup and I was wondering is 25amp relay enough?

Feb 24, 2017 - Modified Feb 28, 2017
C7_Vette - in reply to 01eggy10

With a good quality heater it is more than enough. The pad I used is 600w which after initial heat up only equates to 5amps (600W / 120v=5Amps). It never draws more than 10Amps even on start up. The SSR stays cool to the touch even after a 24hr print. Let me also mention the fact that the first silicone heater I tried was cheaper in price and seemed to be of good quality but something was wrong with it because I blew 2 fuses before concluding that it was bad and therefore too dangerous to even try another fuse. I checked the wiring again and again to just make sure it was done correctly, which I knew was already correct but when something happens like that I suppose you tend to second guess yourself. At this point I pealed the pad off my aluminum plate and returned the heater pad for a refund through Amazon. Then I decided to go with the Keenovo.
Also as Spauda has mentioned several times, AC power is not something to play around with when unsure about it. I'm not saying you don't know how to do it, just wanted to mention to anyone reading this.I also use a 15Amp surge protector as well as a 15Amp fused switch as redundant protection.

With it plugged directly to power how can you control the temperature on this?

Feb 21, 2017 - Modified Feb 21, 2017
C7_Vette - in reply to thejordonian

You use the SSR-25DA with input coming from the Ramps board as with the DC bed which controls the temperature. I don't have the heat bed pad connected to a power supply. The wiring diagram in the appendix shows the setup for the AC type bed connected to the same power supply that runs the printer but it does not need to be connected to a power supply. Instead of connecting the wiring to the power supply I connected to a 2nd fused switch so I could turn on the printer and the bed by separate switches. Then power is supplied to the heat bed pad by simply plugging in the power cord into the switch.
But to answer your question, it is stilled controlled by the SSR.

Gotcha, thanks for that detailed reply. Sorry Im still pretty new to all this and the whole SSR thing kinda confused me as to what purpose it served but I understand it now.


I found this heat bed on Ebay, I looked at the one you reconmended but as of now it's not in the budget. I'll have to try and use that one as best as i can until i can afford the better KEENOVO

If you are not as skilled, you should stick to the stock design as much as possible. Wiring an AC bed is an advanced technique and it could be deadly if done wrong.

"I used a SSR-25DA to control it"

When you say grounded to printer frame do you mean earth(green) or neutral(white)?

Earth green

Feb 15, 2017 - Modified Feb 15, 2017

Could this be setup as a dual extrusion?
Edit: How does the bed leveling work?

Yes, http://www.thingiverse.com/thing:1620590
You just use an Allen key or wrench on the bed screws to level

D-Bot - Two extruders
by Gerzzz

Hi, I have a tempered glass of 314x314 mm and I would like to know if I can put a plate of 330x330 mm of aluminum to warm the bed, it enters the structure of 300x300? regards


is there a real difference between tslot and vslot ?

V-Slot Drawing
T-Slot Drawing

The V-Slot wheels wont align with the T-Slot and the 3D-Printed Parts.

I need to upgrade my steppers. But I can't decide which to choose:
1.8° ?V 1.8A 5.4kg/cm
0.9° 4.35V 1.5A 4.4kg/cm
Bot are double in kg/cm then mine. I'm running DRV8825's so I got enough juice to power them, but I'm concerned about the heat that comes with the big Steppers because the stepper holding parts are still PLA.
Any Advice?

Any chance you could export/attach STEP files?

would if i had any

I wired up the SSR and bed like in the document. Seemed to work the first time. I went to test the bed again and as soon as I turn the machine on the unit starts to heat up. Even though I didn't turn the bed on yet. What would cause this? Is the SSR bad ? Or my ramps?

did you bolt the ssr to a frame piece or heatsink

Yes I sure did bolt it to the frame. Noticed the light on the SSR also doesn't work any more strange.

double check your wiring on ssr pin 1 and 2. having the bed heat up when you power on the printer is a possible sign those wires are swapped

I did. I am using this heater https://folgertech.com/products/12v-280w-silicone-heated-bed-300x300mm-12x12
So there is no ground/postive not polarized I was told. but I do have 1 going to one bed wire 2 going to + on power supply. the second bed wire is on the power supply ground.

can you link to the ssr you bought

It looks legit based on this: http://www.ul.com/newsroom/publicnotices/ul-warns-of-solid-state-relay-with-counterfeit-ul-recognition-mark-release-13pn-52/

but i dont know how they get them so cheap, that says knockoff to me.

did you get the 25 or the 40? 280w/12v is 23.33333333333 amps, thats a lot of juice. I use a 40a relay and only pass about 9amps peak through it to have plenty of margin. if i were you id get a ssr-100dd

Got a source for one?

.banggood.com/Wholesale-Aluminum-Alloy-Heat-Sink-For-Solid-State-Relay-SSR-Small-Type-Heat-Dissipation-p-48066.html?rmmds=search WITH THERMAL PASTE BETWEEN THEM AND BECAUSE OURS ARE IN AN ENCLOSURE I ADD A FAN.. WE ALWAYS USE RELAYS RATED AT TWICE OF WHAT WE ARE HOOKING TO

Thanks I will put in an order.

dont give up troubleshooting the other one, you still need to know root cause

Not sure what else could be causing it. I tried a new Ramps setup and everything and it still starts heating up. Even tried without the ramps wired in and it still heats up. I have to assume that the thing is fried or bad and is fully switched on at this point.

connect 12v from the power supply to hte ssr input terminals and see if hte light blinks


I really like this project - thanks for sharing it with us.

Just two questions:

1) Is it possible to operate the Z-axis with only one stepper-motor in the middle and two fixed rods left and right? Because I don't want to get into balancing-problems like I have it right now with my Prusa i3, that uses the same technic (but for the X-axis, not for the heatbed).
2) For rigidity-reasons I would like to use as few printed parts as possible. Is it possible to replace the 14 printed corner-bracket with metal-ones (e.g. alloy) that I bought?

Best regards


Feb 12, 2017 - Modified Feb 12, 2017
1sPiRe - in reply to DAPFAU

The core XY "X" motor is the left one, and the "Y" motor is the right one. Indeed the front of the printer is the side of this 2 steppers. The left side is the Xmin side and the right side is the Xmax side ; front is Ymin, and back Ymax.

dear sir

I just build d bot core xy, I used the electronic and motors component from sunhokey prusa i3.
the main board i used is mks 2z v1.2.
i have test the printer with repertier and working properly.
but i have problem that the controller cannot display properly. only display 2 lines, so i cannot print with sd card.
i used dbot marlin software and can print with repertier in computer, but controller and sd card not working.
i tried flash firmware to marlin rc7 sunhokey, the controller work, but the printer can,t work.
i have googling to solve the problem , but not succes.
anyone can help me, how to configure the controller.

thank you


problem solved, i use older sofware arduino v 1.0.5, it can compile without error for dbot marlin. now i can print with sd card.

I will admit I have not read all the Comments below, there are 000's

My question is: How BIG can we make this?... I am looking for a build area of 400mm 400mm 400mm

You can go as big as you want. The issue will be finding and powering a heated bed (if you plan on having one).

I really like how the side that rolls along the back is solidly attached to the frame. Im wondering if it's possible to do the sme thing in the front for a full solid grip on all 4 sides, and just place the Z lead screws in the middle, without playing with the center of gravity too much/at all? Drilling holes for wiring is not an issue, but would love for this to be as solid as physically possible (over-engineering at it's finest :p )

Take a look at the J-Bot (a D-Bot remix).

Thank you very much! This is totally what I was thinking!

I've got my D-Bot set up like you describe (Centered Z lead screws and front/back Z rails). I only added the front Z-rail because I have a VERY heavy aluminum (6mm thick ATP5) build plate and wanted to distribute the weight.

You really don't need it otherwise IMHO..

Does anyone have any good pics of how the Z and Y end stop wiring is ran? I know it is in the rear tucked under with a 2020 cover. But from that corner how is it routed to the ramps box?

You can run the wiring however you want, it doesnt have to be like in the pictures, I would recommend not doing it like the pictures because that requires extra hole drilling and wire routing

I wasn't aware you drilled holes to get it that way that explains a lot. Understood I will go another route.

Anyone know why I can't get the screw to hit the Y end stop? The gantry hits the rear idler before the screw head hits the end stop bar. Any Ideas on a fix?

Feb 6, 2017 - Modified Feb 6, 2017
1sPiRe - in reply to jskala

I did have the exact same issue which I fixed with wide washers on the screw that should have hit the endstop.

That was my next approach thought maybe I did something wrong. Think the y end stop holder needs to be a touch longer.

I guess it's due to slight differences between different endstops.

I just configured a 1.1.0-RC8 for my D-Bot.
I'm very happy with the new FW since its a lot smarter in homing and other neat stuff. I won't post my Configuration.h because my steppers and settings differ too much from Spaudas. But for everyone curious: It works :)

I had everything working for a few prints and then my Z axis motors started doing this


This is when I home my z axis. x and y work great. This sound happens before the z endstop is reached. I can manually raise the bed to the endstop without any trouble. Has anyone else run into this issue?

Feb 3, 2017 - Modified Feb 3, 2017

Got my D-Bot running... into some troubles :)
I can move all axes like a charm on manual control. Even Diagonal, everything perfect.
But when I try to print something the steppers randomly pull against each other or something:

This should be a 20x20mm Cube but the first layers get shifted and I have some bad layers.
I've already tried to push the drivers from .55 to .61 but the only thing that happend is that the cube gets shifted diagonaly... Any tips on how to narrow down the problem?

BTW: Im running a 24v PSU and a 24v 300x300 Heatbed. Everything else gets feed by a 24v to 12v 10A Converter. The Heatbed gets hot extremly fast. Less then a minute.

I would start by adjusting your acceleration, or slowing the print speed down. the artifacts you are seeing on the edges are from wobble due to the print head moving to quickly for it's weight....i think. Also, the shifting can be caused by improperly tuned drivers... what voltage are yours running at? if they are undervolted, the motors will have a hard time running, if they are running too high, the motors and the drivers will heat up under operation and eventually start studdering / shifting causing missed steps and making the shift. I would verify with a multimeter that all steppers are between .5 and .7 volts.

Let me know if this helps!

Feb 3, 2017 - Modified Feb 5, 2017
bhorn - in reply to DSchmidt54

Thanks for your reply!
First thing I tried was to tune the stepper. Tried everything between .5 and .65 volts. No success.
But I "debugged" the G-Code to see when it "jumps". And I found the particular Code:
G1 X163.449 Y159.595 F7800.000
G1 X163.202 Y142.430 F7800.000
In other Words: Fast Travels.
So I tuned them down to 7200 (120mm/s) and it did the trick. Much less jumps but I need to reduce it even further. I manually testet 7000 and it went quite well.

But my extruders still hopping and even change direction for a step or so. Tried everything from .55 to .65 volt. Just happens at "high speed extrude". Need to look at that, too.

Slowing down Travel to 7000 did the trick:

Anybody know of a good tablet mount for this printer or 2020 in general. Want to use it for Octopi with this and mount in lue of a LCD.

Feb 2, 2017 - Modified Feb 2, 2017
TheLost - in reply to jskala

I don't use a tablet but i do have an official Raspberry Pi 7" touch screen on mine ($60). You can take a look at my D-Bot build (click the 'Made' link) to see it. I posted the mount i made for that display a few months ago (under my designs)

Thanks, that is a thought. I was just trying to use things I already had around instead of buying something else.

Hello and thank you for all this work.
I also build this D-BOT.
I use arduino / ramps 1.4, should I put jumpers in X, Yet Z ????
If yes how many per axis?
Thank you for your reply.
And hello from France.

Fill out all slots with jumpers (3 jumpers for each stepstik), it will give you 1/16 microstepping. Also remember to put the stepstick in the right way.

Hi. Thanks for this work. I had T-SLOT extrusion, exists a remix for this?

I believe the rails (E) (F) (A) (B) and maybe (C) (D) for 300x300mm extra bed support need to be V-Slot, the rails length can be found the PDF, but I believe the rest of the rails can be T-Slot, have a look at the parts modified for using T-Slot.


I am planing on making a D-Bot with both V-Slot and T-Slot with a larger 300x300mm bed.

T-Slot C&D-Bot Customizations

Hi. Thanks for reply. I am remixing all part for full tslot

If all your rails will be T-Slot, what will you use in place of the Mini V Wheels?

I have seen other designs using linear rail, and linear bearings, like this:




D-Bot rails
by MrBlom
T-Bot Core XY Printer without any cross belt. Next generation
by T-Bot
Dual CoreXY setup that uses LME12UU and 12mm shafts

How tight is the v-slot supposed to fit in the H-bar ends?

My H-bar ends does not sit flush when moved to outer positions. Is this a problem?

imgur.com/a/oZBzI (Picture showing the issue)

Feb 3, 2017 - Modified Feb 3, 2017
jez81 - in reply to trio36

I did notice one that side hit the end before the other on mine (I even printed a large plastic washer to make sure the bolt hanging off the bottom of the H bar hit the endstop). After I put the belts on, the uneven tension made the other side hit 1st.
Long story short, it should even out when you get the belts right.

Thank you. E3D is being very slow with delivery. I am waiting for stepper arrival.

Jan 30, 2017 - Modified Jan 30, 2017

Belts arrived today, all hooked up, moving and homing fine (after a little hair pulling - couldn't get y axis to home the right way..) movements look smooth and solid :)
Just waiting on the glass plate before I can do a test print. Still no luck on the heatbed heating properly. Direct connection to ramps is like the SSR. PSU is 30a, ramps has a 60mm fan and mosfets aren't even warm. Been eyeing up a new control board..

Had another question about the spacers. I've already decided to just purchase the shims from OpenBuilds, and was wondering which spacer is needed? OpenBuilds has two lengths; 1/8" and 1/4", which would work?


Jan 30, 2017 - Modified Jan 30, 2017
C7_Vette - in reply to anthonyburton

I used these spacers which are the exact size called for in the plans.

Aluminum Spacer 8mm OD x 5.1mm ID x 7mm Long

I attempted printing the spacers myself but the older i3 just couldn't get it clean enough consistently over all of the spacers needed. I tried some from OpenBuilds first with the needed shims to get the total length as close to exactly 7mm as possible and it was close but not a perfect fit. After finding the ones from Aluminumspacers.com I ordered these and since I could get the exact size needed no shims were needed. These worked perfectly.

Awesome, I'll be ordering those. Thanks for the link!

I think they are 7mm, so 1/4inch

The spacers are easy to print. The remixed ones are easier to install - the originals are a bit tight on the thread.

Awesome, thank you for the quick reply. Side note, I was the one on Reddit that was printing Gold parts for the D-Bot. Thanks again!

can we see pics or link to gold??

I haven't actually assembled anything yet. I haven't even bought the aluminum. All the pics I have are the parts being printed.

Decided to go ahead with the pcb bed but I'm a little worried about the wiring as I'm not familiar with solid state relays. In the electrical diagram it shows the negative wire to pad 1 and the positive wire to pad 3+4. My bed says 12v on 1 and negative on 3+4. Do they need to be reversed for the SSR or is you bed just different?

I attempted the 12v DC powered bed approach which resulted in massive frustration for a bed this size. I found that if you plan to print with ABS (which is what I primarily use for more strength with parts that will have any stress on them) a 12v DC will not work sufficiently. Even with the SSR-40DD and a dedicated second power supply it took forever to reach 100ºC and could never reach 110ºC even after an hour. It also had massive issues maintaining anything over 75ºC stable. Everyone has their own desires based on what they plan on building, so if one is planning to use only low temp filaments like PLA then it may be fine.

But I would highly recommend using a AC powered silicone pad from Keenovo with an aluminum bed. It heats up to 110ºC in half the time it takes the Hot End to get to 230ºC. Literally waiting longer on the Hot End to heat up rather than the Heat Bed. The temperature has no fluctuation. It stays at set point perfectly. You would then use the SSR-25DA and follow the wiring shown in the appendix at the end of the build guide.This setup also doesn't present the issue of over heating of the SSR. My AC SSR never gets overheated, even after a 24 print. It will be more expensive for the silicone pad and aluminum bed over the standard PCB but is well worth the expenses and their warranty is very good if you would need to use it. Use a safe ground with AC power and you will be fine.

Funny you should post this. I wired up my heatbed today and tried it out. It took forever to heat up and only made it to 51 degrees...I use PLA and PETG so I don't need to get to 100, but only 51 max is pretty pathetic. I use a wanhao i3 that whilst it has a smaller bed, it can reach 100 degrees in a couple mins. That is 12v also.

I had issues with my bed hitting 40ish to 50ish in forever. Per Spauda, I hooked the bed directly to the powersupply (bypassing the relay) and it hit 100 and above in about 3 minutes. Relay was my problem. I changed out to mosfet

Heated beds are just big resistors with no polarity unless the bed in question has a built in led or something extra.

Thanks for the reply. It's a basic pcb only

Printed all my parts in Pla not at arround 50-70 infill on stuff that needed lots of screws, I will see how it goes

I modified the ramps for 70mm fan

Getting so close to finished, pretty excited now.. firmware and wiring all done and working properly, I pretty much just need my belts to arrive. (It's been 4 weeks since I ordered them now, I actually reordered some from in my country I'm that keen) Re ordered another heatbed too as I accidentally ordered a "pcb" heatbed instead of an aluminium one. The pcb bed is so warped it's ridiculous..
Thought I would have plenty of time for the gear to arrive but such great instructions made the build too quick and easy that the hardest part is waiting!

Pcb beds are almost always warped, thats why you clamp glass to it. Thats what i do

I put tape, then some glue and it works ok, sometimes a corner warp's but i think its ok. the warped part is really minor

I recently found this build and I am very impressed with it. So I started printing parts today. I have a e3d titan on want to use but in a bowden config not direct drive. Has anyone made up a mount for this printer to use the e3d titan?

I thought I saw one in the remixes, there are 101 remixes

You are right I did not see that the first time I looked.(Sorry) Thank you for the response. Can't wait to get this going. Great design.

Many people have asked this, as a NOOB I want to ask it too.

The excellent build guide says:

  • 20x40mm V-slot Railing pieces needed:
    (4) at 520mm - A, B, C, D
    (1) at 463mm - G
    (1) at 488mm - R
    (1) at 448mm - Q
    (2) at 333mm - E, F
    (2) at 313mm - O, P
  • 20x20mm V-slot Railing pieces needed:
    (3) at 463mm - L, M, N
    (1) at 503mm - K
    (2) at 313mm - H, J

My question is: default build dimension is 300x200x325. What changes do I have to make to the above listing in order for a 300x300x325?

I would like a more explicit answer than just "make the shorter length 100mm longer". I don't want to find out after ordering parts
that I got my maths wrong.


the dimensions you need are in the appendix at the end of the build guide

Can I use the c-bot calculator to calculate the beam lengths?


So I just finished building this wonderful piece of equipment. Spauda01 did a fantastic job with the instructions. I have been have firmware issues but finally got everything moving in the correct directions. One problem that I had on my first print (20mm cube) is that it printed at about 10mm. Second problem is that it printed not centered on build plate. It printed 52mm left of center and 25 mm aft of center.Third problem happened when it moved to a different position to complete the top layers. Any insight into these problems would be greatly appreciated.

Did you put three jumpers under each stepper driver