ANET A8 + MKS GEN L 1.0 + TMC2208 + MARLIN
Looks like I’m not the only person having problems with TMC2208 drivers.
After seeing this article article I’ve decided that now it’s time to move on and updated my printer from 1.1.8 to 1.1.9 hoping that finally I can use UART mode of my TMC2208. (I had a few extra lying around with re-soldered pins and cables)
There were compilation issues which I was not able to resolve. So I decided, that it’s time to move to bugfix-2.0.0.
Merge was sucesfull, there were not as much changes in configuration files as I expected and compliation was OK! Iv’e printed test cube with TMC2208 in dumb mode and it looked exactly like my cube from 1.1.8 so no regression.
So then I spend 6 hours figuring out why:
- Software Serial is not working
- Some drivers are moving axis only in one direction
According to Atmel Mega board - there are 4 hardware serial port pairs which we can use - i’ve mapped them in the image below:
- AUX-1: (Serial0): seems like this guy is also used by USB serial connection, so it’s not likely can be used with our drivers.
- Z-Z+ Endstop (Serial1): Also endstops for Z axis. I left them sitting there, but I gess if anyone need extra HW serial - he can use servos pins with cable rewiring for Endstops
- EXP-2: (Serial2): place where normal people have 2-ribbon-cable display. Not my case - since i’m using AUX2 for my ANET A8 display.
- Y-Y+ Endstop (Serial3): where endstops reside. Not a problem, since they are re-programmable and used only during homing - I just re-mapped them in
pins_RAMPS.h, so my Y endstop is now X+ endstop.
So in order to use this pins you should set X_HARWARE_SERIAL as corresponding serial.
| TFT Pin | Pin Name | Node MCU (Wemos) Pin | Tasmota Config |
|---|---|---|---|
| RST | Reset | RST | —- |
| CE | chip select | D8 (GPIO 15) | SPI CS (66) |
| DC | Data/Command | D0 (GPIO 16) | SPI DC (67) |
| Din | Serial Data In | D7 (GPIO 13) | —- |
| Clk | Serial Clock | D5 (GPIO 14) | —- |
| Vcc | 3.3 voltage | 3.3V | —- |
| BL | Backlight, 3.3V | D2 (GPIO 04) | Backlight (68) |
| GND | Ground | Ground | —- |
Current motor configuration
| Axis | Driver | Mode | Vref Value | Steps | | —- | ——- | —- | ———- | —– | | X | DRV8825 | 1/16 | 0.5 | 100 | | Y | TMC2208 | 1/16 | | 100 | | E1 | TMC2130 | 1/16 | | 100 | | Z1Z2 | TMC2208 | 1/16 | | 100 |
| Count | Component | Price $ | Link | |
|---|---|---|---|---|
| 1 | ESP8266 | 1.39 | https://www.aliexpress.com/item/32633529267.html | |
| 100 | 1K 0603 resistors | 0.75 | https://www.aliexpress.com/item/32847135098.html | |
| 50 | ceramic capactior | 2.20 | https://www.aliexpress.com/item/32943454441.html | |
| 10 | esp12f adapter board | 1.23 | https://www.aliexpress.com/item/32721385289.html | |
| 10 | 9v connector | 0.59 | https://www.aliexpress.com/item/32876984714.html | |
| 50 | 3.3v voltage regulator | 1.01 | https://www.aliexpress.com/item/32910803907.html | |
| 50 | 5v voltage regulator | 1.42 | https://www.aliexpress.com/item/32821350559.html | |
| 10 | motor connector | 1.50 | https://www.aliexpress.com/item/32911598577.html | |
| 1 | 28byj-48 motors | 1.50 | https://www.aliexpress.com/item/32896006818.html |