Reprap Forum - Controllers Anything related to printer controllers not being Duet, RAMPS or Sanguinololu: microprocessors, motor and heater driver circuitry, gEDA/KiCAD issues, soldering tips, etc. https://reprap.org/forum/list.php?13 Sun, 12 Jul 2026 04:58:05 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?13,897632,897632#msg-897632 Industrial stepper-drivers (no replies) https://reprap.org/forum/read.php?13,897632,897632#msg-897632
Thanks
Shane]]> sbkenn Controllers Fri, 19 Jun 2026 12:05:23 -0400 https://reprap.org/forum/read.php?13,897448,897448#msg-897448 Need some help identifying and configuring an old controller board. (no replies) https://reprap.org/forum/read.php?13,897448,897448#msg-897448
I've come across an old board, I think it's a Tronxy P802MA based on melzi:

However I've flashed marlin and klipper to the board, but I simply cannot get the endstops on x/y working, without knowing exactly what board I'm working with, it's a bit of a struggle to make sure I have the right pins, or I'm dealing with a hardware failure.

I'm on klipper at the moment and the configs I am use are:

[stepper_x]
step_pin: PD7
dir_pin: PC5
enable_pin: !PD6
microsteps: 16
rotation_distance: 32
endstop_pin: PC2
position_endstop: -8
position_max: 220
position_min: -45
homing_speed: 50

[stepper_y]
step_pin: PC6
dir_pin: PC7
enable_pin: !PD6
microsteps: 16
rotation_distance: 32
endstop_pin: ^PC3
position_endstop: 0
position_min: -5
position_max: 220
homing_speed: 50

I've tried various combos of reversing logic or using pull up to no avail

I'm getting 4.9v at the pull up resistor in front of the endstop socket, but S+G is only seeing 2.8v - V+G is seeing 12v

The Z endstop is working fine, S+G showing 5.5v dropping when closed

PS: you may need to zoom in on image to see where I took voltage readings

thanks]]> Mart7 Controllers Fri, 30 Jan 2026 18:11:20 -0500 https://reprap.org/forum/read.php?13,897374,897374#msg-897374 MKS Robin Nano V3.1 flashing via USB? (2 replies) https://reprap.org/forum/read.php?13,897374,897374#msg-897374 I have an new MKS Robin Nano V3.1 board. Is there a way to flash the board via USB?
I would like to use a command-line tool (bossac or similar) for this. The onboard media (USB/SD card slot) are no longer accessible after installation.]]> Flyer2000 Controllers Fri, 19 Dec 2025 05:25:23 -0500 https://reprap.org/forum/read.php?13,896947,896947#msg-896947 Reprap Discount Full Graphic LCD Controller - Blue Screen (8 replies) https://reprap.org/forum/read.php?13,896947,896947#msg-896947
I have a Full Graphic LCD Controller that starts blue screen after the print starts.
Before comanding the print, the screen shows the status normally.
Bul after the print starts, the blue screen appears.
Sometimes starnge caracthers appear at any moment.
Does anybody know how to fix this?
Thanks!]]> Henrique Controllers Sat, 19 Jul 2025 15:47:14 -0400 https://reprap.org/forum/read.php?13,895438,895438#msg-895438 replacement for MKS Gen-2Z v1.1 (4 replies) https://reprap.org/forum/read.php?13,895438,895438#msg-895438 3dby3d Controllers Fri, 09 Aug 2024 15:26:30 -0400 https://reprap.org/forum/read.php?13,894920,894920#msg-894920 SSD1309 Oled 2.4" display (no replies) https://reprap.org/forum/read.php?13,894920,894920#msg-894920 I'm trying to get to work a graphic oled 2.42 inch display with my printer running Marlin 2.1.2.2 with Arduino Mega + Ramps 1.4.
The display has I2C and SPI capabilities, although the default is SPI.
I tried first with an Arduino board and after some trial and error I was able to make it work.
Besides the regular SPI signals (MISO, CLK & CS) needs two more signals Reset and DC.
As far as I could find, most configurations handle in the best case the CD signal but I was not been able to drive the reset properly. I tried most of the configurations available in Configuration.h but I got nothing in the display at all.




Any pointers?]]> roman9999r Controllers Tue, 28 May 2024 02:06:20 -0400 https://reprap.org/forum/read.php?13,894340,894340#msg-894340 RAMPS 1.4.4, RAMPS-FD, or RADDS (2 replies) https://reprap.org/forum/read.php?13,894340,894340#msg-894340 It is quiet here. Lots of posts with many views but little to no replies. I don't know if its the way the posts are, or just the community, but I would like to change that.

I am looking to move to 32 bit. It does not seems that there are any of the RAMPS style shields available anymore. Seems I missed my chance.
I am looking to build a corexy. I do not need ethernet or wifi. I think it would work with RAMPS 1.4. I really do see the reasoning of doing one thing well. So an Arduino board, a shield and drivers seems like the ideal.

I have found the gerber files of RAMPS-FD, but not the others. I was hoping that someone on this site still has them. I think a few of the developers are still listed here as members.

But the real question is how do they compare? It looks like the RADDS is the most finished, but the RAMPS 1.4.4 the most effective.

If I need to assemble them myself, which should I go for? It looks like the RAMPS-FD would be $4.99 a board, 5 board minimum. Seems workable.

What does this community think?

Thanks]]> Progr3ss Controllers Fri, 09 Feb 2024 22:02:02 -0500 https://reprap.org/forum/read.php?13,894324,894324#msg-894324 MKS Mini v1.2 powersupply? (no replies) https://reprap.org/forum/read.php?13,894324,894324#msg-894324
I was given a old kossel mini that I'm trying to ressurect. It has a MKS mini v1. 2 board. I'm trying to figure out what the power requirements are, and Google is not being very helpful.

It doesn't have/support a heated bed so I can't imagine it requires huge amounts of current. Does anyone know how many amps the power supply needs to be?]]> Lenny25 Controllers Wed, 07 Feb 2024 14:47:38 -0500 https://reprap.org/forum/read.php?13,894320,894320#msg-894320 Lerdge-X (no replies) https://reprap.org/forum/read.php?13,894320,894320#msg-894320 [youtu.be]

Hope you can help I have a homemade 3d printer parts from ender3 Lots of machining lots of work.

I was using the motherboard of the ender3 Which finally died after about six years lots of printing

--Lerdge-X V1.0.3-- Had it lying around waiting for the day that my ender 3 breaks down here we are Everything is in place and working.The issue I have What printer do I choose in cura I tried a generic printer. No luck is started printing before I got the temperature]]> papo Controllers Tue, 06 Feb 2024 17:36:53 -0500 https://reprap.org/forum/read.php?13,894223,894223#msg-894223 Schematics of extension board Builder3D printer (no replies) https://reprap.org/forum/read.php?13,894223,894223#msg-894223 As far as I can determine, the add-on extension board is defective, since when I mount it
on the main board, the power supply which should be 5V at several points that I measure, drops to a waaay to low voltage.

What I'm looking for is the schematics of thisThe main board is extension board.
(Check the image attached.. the extension board is at the bottom right, the HDMI connectors is on that board)


The main board is a PrintrBoard REV D of which I have all info, just the extension board info I'm missing...

Anyone have any info/experience with this?]]> ppeters Controllers Sat, 27 Jan 2024 10:52:57 -0500 https://reprap.org/forum/read.php?13,893863,893863#msg-893863 controler does not work anymore (1 reply) https://reprap.org/forum/read.php?13,893863,893863#msg-893863 Have for some years a HE3D printer with a MKS base V1.5 board, 1 extruder. Still can connect with Arduino ide with the board but the board does not work anymore. Using Repertier-host, this will connect but not print anymore. Think some program did change the original software :-(.
Can someone help me with this software problem ?? I can use a HEX file of INO for arduino/AVR.

Did try to install the Arduino blink file and this works oke, so i can enter the controler but do not have the correct program for it.
Hope someone has the official file for it.

Regards
Kees Kamhoot
the Netherlands]]> kees.kamhoot Controllers Tue, 28 Nov 2023 08:54:13 -0500 https://reprap.org/forum/read.php?13,893507,893507#msg-893507 Identifying low-end controller for open-source clay printer (5 replies) https://reprap.org/forum/read.php?13,893507,893507#msg-893507
It's been an awful long time since I hang out here (more than 10y) but I would like to consult the incredible hive mind here again. I'm currently working with Product Development students on a modular flexible open source 3d clay printer. Most stuff is easy to settle on except the electronics. We would like to make the machine compatible with two options:
-A high end option using Duet and RepRap Firmware (RRF), this because it is the most used board in commercial ceramic 3d printers like the Lutum, Potterbot or Stoneflower and a favourite amongst DIY enthousiasts in the ceramic 3d printing community. It's open source, well supported and has shown to be viable as a long term controller choice (so no question here honestly).
-A low end option, especially to drive cost down and make it accessible in the less wealthy regions of the world where there's a lot of demand. 5 years ago the choice would be easy with an Arduino + Ramps. But today I'm not sure anymore what is the best default low-end option. Ramps & 8-bit seem to be on the way out? These days lot's of 32bit boards seem to be around but I also see a tons of boards from Asia that seem to have a large diversity of dimensions and layouts. There doesn't seem to be anything that develops stably on a single dimensional footprint or pin layout?

The requirements for a clay printer(and so an OS one) are fairly basic:
-Delta machine 3 motor axises (so 8 bit sometimes a limitation)
-2 extruders (some clay extruders combine 2 stepper motors, one on supply and one in extruder)
-no heated bed or hot end requirements so low power consumption
-easely available around the globe!
-long term option, hopefully around for 5+ years or drop-in upgrades (same footprint, layout etc)
-no need for incredible speed or super high resolution or other fancy features (1-3mm nozzle typically, 0.5-1mm layer height)

related obviously is the firmware. For the high end it will be RRF, would be fantastic if there's a cheap board that also supports it but options there seem limited. Am I correct that the BTT SKR3 supports RRF? I also found this port:
[teamgloomy.github.io]
Not sure how stable that is long term.
Alternative would be good old Marlin (2?) with the disadvantage of supporting 2 firmwares...

Looking forward to your input!]]> unfold Controllers Sat, 07 Oct 2023 16:56:50 -0400 https://reprap.org/forum/read.php?13,893249,893249#msg-893249 BTT SKR 1.4 Turbo with MKS TS35 (17 replies) https://reprap.org/forum/read.php?13,893249,893249#msg-893249 Skhan Controllers Sat, 31 Aug 2024 09:41:25 -0400 https://reprap.org/forum/read.php?13,893110,893110#msg-893110 CRAMPS V2.2 AND KLIPPER: no PRU (1 reply) https://reprap.org/forum/read.php?13,893110,893110#msg-893110 After a tons of problem with the libraries, now it is able to create the firmware for PRU unit. Unfortunatly now I have this problem:

mcu 'mcu': Unable to open port: [Errno 2] No such file or directory: '/dev/rpmsg_pru30'
How can I create it?
Thanks]]> SM180 Controllers Fri, 21 Jul 2023 06:11:18 -0400 https://reprap.org/forum/read.php?13,892644,892644#msg-892644 Looking for radds 1.6 schematic (for klipper) (4 replies) https://reprap.org/forum/read.php?13,892644,892644#msg-892644 i'm looking for schematic of a radds 1.6 that i bought some years ago ...
I would like to use it with klipper on a new printer that i'm building but i
have some troubles to find a schematic and a pinout for to check if the config file is correct.
Can you help me?

the link [doku.radds.org] is not working ....
Thanks all!]]> Tdmax Controllers Tue, 02 May 2023 09:53:10 -0400 https://reprap.org/forum/read.php?13,892431,892431#msg-892431 Trouble with BTT SKR MINI E3 stepper rotating slow (no replies) https://reprap.org/forum/read.php?13,892431,892431#msg-892431 I have BTT SKR Mini E3 v2 board with Marlin 2.1.2
The board is new, I did some testing with it but other than that it is new. I dont think I have toasted it with anything but never know 8-)
Issue is the following:
Once uploading firmware the Y motor runs exactly 1/8th of the speed. The setup is coreXY so this should not happen. Both motors should spin same speed when movement is orthogonal.
The things that I tried so far:
  • Swapping motors. Motors are OK
  • Changing steps/mm value in firmware, however in corexy configuration marlin does not allow you to have different steps/mm for the motors, they will run one speed x dir then other speed y dir. It was my first idea to just multiply the steps with 8.
  • microstepping is 16 for both motors
  • I have tried changing the pins of Y to Z in the pins file, the issue is the exact same hence I'm suspecting it is software related not hardware
  • Issue is same if I comment out the corexy setting in marlin

Here is a video of the problem in action, as you will see the setup is extremely minimal, only the motors are connected to the board: https://drive.google.com/file/d/1Z0V02q8_YKEnI5gHkSghmK6WUER_wdlu/view?usp=sharing

here are my config files:
https://pastebin.com/pebDtujY
https://pastebin.com/Rq7LD3va

I want to know what do you think, is my board faulty or is it some software issue I'm overlooking.:S]]> daninet Controllers Wed, 05 Apr 2023 10:45:51 -0400 https://reprap.org/forum/read.php?13,892047,892047#msg-892047 Is it possible to get the Firmware off a MKS gen L v1.0? (2 replies) https://reprap.org/forum/read.php?13,892047,892047#msg-892047
A friend gave me his printer to repair, I have no clue what brand it is and I don't know anything about the components. All I know is that it's some kit he got off AliExpress years ago.

I fixed the major mechanical issues, though there's still some stuff I need to do, like adding a cooling fan. Problem is, the Firmware isn't set up with a cooling fan in mind and I'd like it to be controllable, but since I have zero information on the printer I can't exactly download the firmware from anywhere and I'm not about to dig around sketchy Chinese sites to get a firmware that might work...

So I was wondering if it's possible to somehow read it off the board or something? I haven't used this style of controller in my builds for a while now, so I've kind of grown used to having the config and all that on an SD for the duet...

I could configure a new firmware but that would require some trial and error, especially in regards to the mystery hotends in there, since it is a dual extrusion setup.

Also I'm glad I remembered this forum. I haven't been here in a while heh...]]> Ramon3D Controllers Wed, 22 Feb 2023 04:02:27 -0500 https://reprap.org/forum/read.php?13,891983,891983#msg-891983 config file for mega2560 (5 replies) https://reprap.org/forum/read.php?13,891983,891983#msg-891983 thank you for you help]]> Juan Controllers Sun, 19 Feb 2023 10:41:10 -0500 https://reprap.org/forum/read.php?13,891284,891284#msg-891284 'RAMPS' board for stm32 'development boards' (no replies) https://reprap.org/forum/read.php?13,891284,891284#msg-891284 Ramps board that can cater to stm32 and other ARM based 3.3v 'development boards'.

I did not find it earlier until ...

I stumbled into this board
[github.com]
[github.com]
[biqu.equipment]

it is the 'M5' extension board and not the GTR-V1 board that I'm interested in

The good thing about that 'M5' board is that the microcontroller is not on the board.
So you can literally take any other (stm32 or ARM etc) development boards and connect them to this M5 'extension board'
Use 'dupont' wires to jumper wires from your 'development board' to the 'M5 extension board'. The M5 board is literally a 'Ramps' board substitute, in particular i'd think suitable for stm32 mcus (and maybe many more ARM (e.g. Rpi pico), and other mcus).

cross posted in mastodon
[3dp.chat]]]> ag123 Controllers Thu, 08 Dec 2022 04:12:50 -0500 https://reprap.org/forum/read.php?13,890578,890578#msg-890578 TMC5160 V1.2 and TMC5160 V1.3 (no replies) https://reprap.org/forum/read.php?13,890578,890578#msg-890578 (SPI)]]> celtic Controllers Fri, 23 Sep 2022 15:55:13 -0400 https://reprap.org/forum/read.php?13,890485,890485#msg-890485 RepPanel - A modern touch screen user interface for RepRap 3D printers (1 reply) https://reprap.org/forum/read.php?13,890485,890485#msg-890485 My name is Wolfgang, I am the developer of RepPanel.



RepPanel is a user interface for RepRap based 3D printers that features a 3.5" touch screen with a well-designed user interface to control your 3D printer, setup, monitor or stop prints etc. It recently also supports multiple tools.
Have a look here: https://reppanel.com
There is also a Online-Demo available!

I created RepPanel as a little side project because available 3D printer UIs were a bit expensive for the user experience they offered. The first generation of RepPanel is based on custom DIY PCBs and screens from China. This HWv1 version lacked additional RAM, had some driver issues and was pretty bulky.

Since I believe that RepPanel is a great tool and many others would like to use it too, I decided to port the existing code to an off-the-shelf hardware board. This HWv2 version offers excellent value, does not require any hardware skills and fixes the existing driver and RAM problems of HWv1.
You can buy the hardware form your local supplier and then only have to flash the firmware with easy-to-use tools.


]]> seeul8er Controllers Sat, 10 Sep 2022 11:54:36 -0400 https://reprap.org/forum/read.php?13,890473,890473#msg-890473 MKS Gen L with 300+°C hotend (1 reply) https://reprap.org/forum/read.php?13,890473,890473#msg-890473
What is the simplest what to to fit a probe capable of reading higher temperatures?

PT100s seem to need a daughter board and a PT1000 needs the MKS board modified.

What is the simple as way to do this? A high temperature thermistor? Where would I get one for a E3V6 block.

Thanks All.]]> aamcle Controllers Fri, 09 Sep 2022 17:42:48 -0400 https://reprap.org/forum/read.php?13,890234,890234#msg-890234 MKS Gen L v1.0 and BTT TMC2209 - Sensorless homing (1 reply) https://reprap.org/forum/read.php?13,890234,890234#msg-890234 I have bought a new MKS gen l v1.0 and 2 BigTreeTech TMC2209 drivers. They have 5 pins on facing upwards (PDN, PDN, CLK on long side, DIAG and VREF on short side).
The board does not have 9 pins below driver like SKR and newer versions of MKS.

How do I connect the top pins to make StealthChop and Sensorless Homing work?
Please advise for connections and software both.


I have bent the 2 downward pins(DIAG, VREF) near pot and 2 pins from long side (both PDN) as instructed in this video

[www.youtube.com]]]> jayesh Controllers Wed, 10 Aug 2022 00:15:32 -0400 https://reprap.org/forum/read.php?13,889891,889891#msg-889891 Creality 4.2.7 LCD Screen (3 replies) https://reprap.org/forum/read.php?13,889891,889891#msg-889891
I have a Creality 4.2.7 board here I am planning on using and also have a Ramps 1.4 complete kit. Was going to try and use the RAMPS LCD board on the creality. Will this work?]]> guerd87 Controllers Sun, 13 Aug 2023 15:33:43 -0400 https://reprap.org/forum/read.php?13,889849,889849#msg-889849 BIGTREETECH GTR V1.0 Control Board 32Bit (1 reply) https://reprap.org/forum/read.php?13,889849,889849#msg-889849
I am looking for a 32bit controller that would work better than Arduino 2560/Ramps controller.]]> Roberts_Clif Controllers Mon, 04 Jul 2022 17:32:59 -0400 https://reprap.org/forum/read.php?13,889115,889115#msg-889115 Bigtreetech SKR 1.4 Turbo with Thermocouple (3 replies) https://reprap.org/forum/read.php?13,889115,889115#msg-889115
Looking at the schematic for the board, it looks like possibly on the TFT connector, there are 2 pins (0.2, 0.3) which on the LPC1769 chip are labeled as "P0.2/TXD0/AD0.7" and "P0.3/RXD0/AD0.6". I'm guessing that any of the "AD0.x" pins are analog pins. Does anyone know if one of those will work? And since that connector has +5V and GND pins as well, would those analog pins accept a max of 5V input? The E3D board needs 5V input and I think it probably outputs up to 5V as well.

This seems to be my only stumbling block in getting this up and running, so any help would be appreciated.]]> brucehvn Controllers Tue, 25 Feb 2025 01:05:07 -0500 https://reprap.org/forum/read.php?13,888720,888720#msg-888720 connectors for bigtree motherboard (2 replies) https://reprap.org/forum/read.php?13,888720,888720#msg-888720 bigrednurse Controllers Tue, 15 Mar 2022 07:48:51 -0400 https://reprap.org/forum/read.php?13,888380,888380#msg-888380 MKS_GenL v1 issue (3 replies) https://reprap.org/forum/read.php?13,888380,888380#msg-888380 I flashed Marlin 1.1.9 and the printer seems be working well, except for one thing. The print head moves up about 1mm just before it lays down the filament.
It moves up a few mm, then zero's itself. it then moves to print and at last moment, it raises a bit.

This is my G-code. I looked in the config.h file, but don't really know what I should be looking for.

G28 ;home
G92 E0 ;Reset Extruder
G1 X1.1 Y20 Z0.28 F5000.0 ;Move to start position
G1 X1.1 Y200.0 Z0.28 F1500.0 E15 ;Draw the first line
G1 X1.4 Y200.0 Z0.28 F5000.0 ;Move to side a little
G1 X1.4 Y20 Z0.28 F1500.0 E30 ;Draw the second line

Any help would be great,
Ian]]> Ianmark Controllers Sun, 20 Feb 2022 21:17:52 -0500 https://reprap.org/forum/read.php?13,888209,888209#msg-888209 MKS Gen_L SD card not always working (1 reply) https://reprap.org/forum/read.php?13,888209,888209#msg-888209 I have this Gen_L v1.0 board no SD card slot on it. I have an external SD card reader (that cheap 5pin type used for arduino projects), I have defined the pins in marlin, I have uploaded an autostart gcode and it starts about 1/3 of the times. I can always read the content of the card with pronterface, I don't have any read/write issues, this autostart thingy only works a handful of times for whatever reason. I had a reprap discount LCD in the drawer and I have connected it. The SD card reader on the LCD works all the time, the gcode always runs on powerup. I want to keep this as a low power project as it will be battery operated so preferably I don't need the screen just the reliable SD card.

Questions:
Can I connect my SD card reader to some of the EXP1 EXP2 pins and expect it to work better? (I'm not sure if there are dedicated MOSI/MISO/CS pins in EXP1/EXP2 please tell me if there are)
Do you have any tips to make the SD card reader more reliable on startup?
Do you know an SD card reader that is maybe better in working at startup?
As a last resort, is the discount screen pcb going to work if I desolder the LCD and keep the board only?]]> daninet Controllers Wed, 09 Feb 2022 11:48:41 -0500 https://reprap.org/forum/read.php?13,887953,887953#msg-887953 MKS DLC32 : ESP32 CNC, LASER MAIN BOARD (4 replies) https://reprap.org/forum/read.php?13,887953,887953#msg-887953 It is for my DIY 600x600mm DIODE laser with NEJEF30130 module.
It uses Grbl FW and I used LaserGrbl and LightBurn to run this board and I was very pleased.
I was able to upload files wirelessly through its WIFI and accessed webUI directly to control my laser.
I tested out and worked right out of the box (of course, I updated its FW from default CNC's to laser)

When I bought it , I did not realized that I would need a screen to better control offline laser, so had purchased separately a 3.5" touch screen. (seller was kind enough to honor me the combo price, loved it. saved me $5).

Now , I am in the work to upgrade my newly purchased K40 CO2 laser engraver cutter. from all the comment from the github, it looks very promising.
hope this can help some one.
cheers.
PS: it's been a while from my last visit to this forum... love to be able to share!!!


Mks DLC32 I bought]]> Bobyni Controllers Fri, 21 Jan 2022 17:47:36 -0500