TMC2208 Causing Duet WiFi to reset

Noa Treiman

Hello, when I send a move command to the external motor driver, connect through drive 9, the duet resets itself. I’ve checked the wiring with the stepper motor and it is correct. There don’t appear to be any faults. I’ve noticed before that the TMC2208 causes significant voltage spikes when it is in use in other circuits, so maybe this is the problem. I don’t have any decoupling capacitors placed at the moment. Please let me know if you’ve encountered a similar problem. Thanks!

o_lampe

@Noa-Treiman Using TMC boards can be tricky, because you have to configure them to match your controller.
Are you familiar with the FYSETC Wiki? There you can find more details about them.
I had good results with them in standalone mode (no UART support) on Duet2Wifi and in UART mode on a Fly Mellow board running RRF.

dc42

@Noa-Treiman are you using a stepstick-format TMC2208 board? If so, have you connected a 100uF or greater capacitor between the power pins of that module, close to the module? That capacitor is required and not included on the stepstick.

Noa Treiman

@dc42 Thanks so much for your advice! I believe it is a stepstick format. I didn’t realize I connected a 12V capacitor across the 24V power input to the motor driver. Suffice it to say the capacitor popped. Now the board’s wifi network is not showing up anymore and I can’t communicate with it over serial. LEDs are still illuminated on the duet wifi. Do you think I could’ve killed the board with this mistake?

Noa Treiman

@Noa-Treiman Update: The Atmel CPU is very hot

Noa Treiman

@o_lampe Thanks for the link. The wiki is super handy!! I also found standalone to be the easiest in prior setups—the current setting potentiometer is pretty finicky though!

dc42

@Noa-Treiman said in TMC2208 Causing Duet WiFi to reset:

@Noa-Treiman Update: The Atmel CPU is very hot

Unfortunately, that probably means that the CPU has been damaged by incorrect wiring between the Duet and the stepstick, resulting in more than 3.3V being fed back into one of the Duet pins that you connected it to. A bad or missing ground connection between the stepstick and the Duet could do that.

Noa Treiman

@dc42 Oh you know what, I think the ground connection did get separated. I did not know that was a thing. Oh well, good to learn

I have a duet6HC mainboard that I connected and will finish my project with it. It’s a duel extruder add-on for my ender 3. I will post when its done!