Recent Topics


by 3D-ME

RepRap is humanity's first general-purpose self-replicating manufacturing machine. It is an open-source project that focuses on the creation and development of 3D printers that can print (some of) their own parts.

More information can be found at the wiki: http://reprap.org/wiki/Main_Page

This group is a place to discuss and share files related to, but not limited to; printer designs, modifications/upgrades, calibration, etc.

Join to share your own RepRap related designs with this group!

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Slicer Speed

by MakeItMakeItMakeIt

So I slice a part in Cura 4.6.1 with a Print Speed of 30mm/s.

When it's actually running on the printer, I can hear and see that it's faster than 30mm/s, and the display tells me it's running at 100mm/s, so I have to go into Tune and slow it down to 30.

Anyone have any thoughts as to why this would happen?


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Large format 3d printer/cnc, and linear rail HELP NEEDED

by ndisalvo

I am in the planning stages of a potential large format 3D Printer build, and want some input. I am considering what the best budget option for the linear slides/ rails is. Currently, here are my options, and the pros/cons:

Aluminum t slot with v bearings: more expensive, possibly higher accuracy
Aluminum square tubing with 3d printed bearing blocks that clamp 608 skateboard bearings to all sides
EMT conduit with 608 bearings like the MPCNC
12mm metal rods with linear bearings
Supported linear rail with bearings

What are your thoughts?

I plan to build the machine in a gantry style that takes design aspects from cnc machines that have a stationary bed. I hope to eventually equip it with a E3D Volcano or Supervolcano hotend, and a diy Pellet extruder for recycling old prints, and printing with cheap pellets. As for a heated bed, I will likely be using multiple smaller heated beds tied together and powered through some relays. I am also considering having dual control boards with a multiplexer/ demultiplexer circuit to switch the stepper and endstop wiring between control boards. This would enable me to run a 32 bit control board for 3d printing, and have the option to switch control over to an arduino uno with a GRBL shield for cnc milling and laser cutting. I have never seen anyone do a dual control board setup before. This is the best way I know of to achieve the dual function, other than building a custom PCB, or switching firmware for different uses. Please let me know if you are aware of a better way of doing this. For now, I am working with a budget of $500 USD to get a working printer with the volcano hodtnd, and adding on features as I go.

Any ideas are appreciated as always

arduino CNC_Machine grbl Large_Format linear_bearing linear_rail Marlin MPCNC ramps_14 reprap
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HUGE 3D printer concept - how to get over the hurdles?

by Ender3Guy

So, I've decided to build a massive FDM printer. 1000 mm in all directions for build volume. It's also going to be an IDEX system with a remote direct drive extruder on each. And obviously a CoreXY, since anyone who tries to move that kind of heated bed quickly has no concept of momentum.
It will also be enclosed for ABS printing, with an air scrubber using 3M cartridges.

However, there are several hurdles, so I decided I'd come here for help.

First of all, which control boards and firmwares support IDEX setups? I would like a 32 bit processor if possible, preferably with 64x microstepping or greater.
And of course, the heated bed. Does anyone know where I could find a monstrosity like that? Alternately I was considering linking four CR-10S-5 heatbeds together, but it would have ridiculous PSU requirements and probably need two outlets.

Again with the heated bed, I need some sort of build surface that is 1 meter in X and Y axes. I prefer glass coated with an ultrabase coating or similar, though flexible plates are also an option.

Edit 1:
Thanks to everyone who has responded since the original post. The concept has evolved since then:
IDEX platform with dual E3D V6 Gold hotends and 5015s for cooling.
MGN12 linear rails on X and Y axes, with linear rods for the Z.
The X and Y axes will move up and down via four ball screws and four steppers synced with a belt.
A BLTouch or similar sensor will be mounted on one of the print heads for ABL, but the bed will use 3-point leveling and level itself to the nozzle.
Each hotend will have a Zesty Nimble RDD mounted on it.
The aluminum buld plate will be custom machined from AW5083 aluminum to stay flat. Alternately I've been considering steel, though I don't know how that would handle thermal expansion.
The total motors I'm looking at are:
Two leveling motors for the heatbed (I'm using 3 point leveling and the 3rd point will be the reference for the Z offset)
Four Z motors
Two X motors
One Y motor
Two extruder motors
Total is 11 motors. I'm also tempted to add an MMU to one of the hotends which would bring the count up to 13.
An Odroid XU4 will be connected to three RAMPS boards via Klipper to handle the stepper requirements. The Pi 3 or zero are also options, but I would like to have slicing built into the machine, assuming Klipper can do this. If not I'll probably have a Zero running Klipper with an XU4 connected to it and sending over the sliced files.

Update 2:
I've decided that an IDEX system is interesting but not optimal. Instead, I'm going to make a toolchanger similar to E3D's, but not using their motion system. It looks like I'm going to need another RAMPS board!

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How do i set up Marlin for a custom SCARA robot?

by EasyMcguire

The robot that i want to configure it this one: https://www.thingiverse.com/thing:4010129
But in scara orientation, where the linear axis is vertical and both arms move horizontally.

My questions are as follows:

Is it possible to:

-configure a robot other than MPScara or Morgan-Scara with marlins default config files?
-use a scara with non equal arm lengths?
-having both arm segments home in a position where they are parallel/180° towards each other?
-set up everything in the config, scara.h and scara.cpp files without the need for Gcode commands?

And are all settings related to scara dimensions and kinematics contained only in scara.cpp?

I would be glad if someone can help me.

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