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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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Build Help

by j523

I have the Monoprice Select mini and have had it for over a year (I love it) but it doesn't have a large build volume so I am wanting to build a RepRap and I am planning on using:

-A single extruder (with Bowden drive)

-I am going to use 28BYJ-48 ULN2003 stepper motors (https://www.amazon.com/Elegoo-28BYJ-48-ULN2003-Stepper-Arduino/dp/B01CP18J4A/ref=sr_1_4?s=photo&ie=UTF8&qid=1523719982&sr=1-4&keywords=stepper+motor)

-Arduino Mega + Ramps 1.4 Board (https://www.amazon.com/Wangdd22-Printer-Controller-Mega2560-Compatible/dp/B01G6ON5H8/ref=sr_1_30?s=industrial&rps=1&ie=UTF8&qid=1523733645&sr=1-30&keywords=Arduino+and+Ramps+1.4&refinements=p_85%3A2470955011)

-Then this is where my problem lies...I haven't worked with an Arduino before and am not sure where to find the code for it (it's a Cartesian printer)

Any help would be much appreciated!

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Squished print??

by opy01

I am building an AM8 style printer with 4 extruders and up until today I've had pretty good luck. I am using a RAMPS 1.4 and a RAMPSXB and everything works great, other than the steppers getting hot. X and Y are using TMC2130s with the current set to 1.4 amps and the steppers can handle 1.5 amps.
The steppers are cheap and the Y axis slips if I print too fast, but it still works at slow speeds. The extruders and Z axis are using the stock drivers which I've adjusted. Extruder 1 and 2 are lined up and the offsets set in firmware and I printed a really nice 2 color frog. It turned out almost perfect. It was maybe .05 mm off on the x axis, if that. I got started on extruder 3 and printed a calibration cube from this site https://www.creativemechanisms.com/blog/learn-about-polylactic-acid-pla-prototypes which I used on extruders 1 and 2 and they came out perfect. I had to adjust my offsets some so I adjusted them in Marlin and uploaded the firmware to my printer. Yesterday, after cleaning up a couple of screw-ups, I finally got the frog printing using extruders 1 and 3. My nieces wanted the frogs so I let them pick the colors. One of the colors was a cheaper filament that will be gone soon (either trashed on the spool or trashed via test prints), but it does not like lower temps. On my good printer I print almost everything at 185 and it's perfect. This stuff needs at least 195-200. I found that my extruder steppers were getting real hot, so I checked the drivers and turns out I only adjusted the axis drivers and not the stepper drivers. The steppers were getting too hot and the crappy filament was slipping in the teeth because of it. I put a heatsink on the stepper motor itself and adjusted the POT on the driver and everything started working great again. So the frog printed yesterday and it printed well. There was some underextrusion where I dropped the temps to confirm it doesn't like lower temps, but it printed none the less.

This is where I come in today. I decided to print another calibration cube as the x offset was still off some. When it was printing, something didn't seem right. The crappy filament was not underextruding but the nice black I use was overextruding. When the print finished, it was about 40% shorter than it should be and looked like total crap. The LCD said it was roughly 14 mm but it was only 8 or so. I printed one Monday night using the exact same gcode and filament and it looked perfect. It looked like it started printing fine, but around 1/3 of the way up it started squishing like the z axis was not working right. I swapped drivers and adjusted the new one, same thing. Using the LCD, I raised the Z up to 110 mm and measured and it was definitely at 110 mm. I just created a new gcode file and that didn't work either. I ordered new steppers in case they are just so sucky that they are on the verge of death after a week of testing and calibrating.

I'm at my whits end on this thing. There is no reason it should do this. Any help is appreciated.

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Buying advice ???

by Venomouse

Budget: $1000 - $2000 Australian

I’m printing out a puppet design that stands 600 mm high and 300 mm wide. I realize I will likely need to split.

Things I’m after (*would be nice)

removable build surface heated bed (though I usually print in PLA) auto leveling print resumption filament sensor

Would prefer an assemble and go type deal as I have already gone through the upgrading process on my Anet a8.

Was looking at the CR-10, however research indicates they have a lot of common issues, ie warped glass, filament rubs on Z screws etc. Asking the community these still occur.

Any suggestions for something that will 'just work'. Ie no need to print extra parts ?

While I do realize this hobby gets involved, I am more than happy to print mods etc, but it would be great If I could spend less time trying to get the printer to print reliably than troubleshooting (Anet A8 with ramps board such fun.)

Thank you

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3D touch clone (BLtouch Geeetech) problem with random errors

by Hesus

Hi. I have a big problem with a new sensor. On every first print sensor work perfectly (not always but almost always) but on second ATTEMPT to print sensor starting random alarms (probe isn't hitting the bed or something like that, i increased Z homing speed too) or just crashing/lagging i don't even know how to describe he just don't deploy probe after checking point and staying in stow position and hitting a glass on bed... Under post are 2 videos and my marlin settings. I tried everything and i'm close to give up. The printer is my own build on ramps 1.4 and raspberry. Sensor is wired correctly like on geeetech wiki (3 wire connector on servo pins 0 or 1 i changed this many times and 2 wire connector on z_min_endstop)

First link is with fail bed leveling (it's a second attempt)

Second link is a perfect work for me but this alarm at the end is weird (it's first attempt after turn on printer)

Here is my configuration.H from marlin

Here is my configuration_adv.H

Here is my pins.H

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