Question Voron 2.4 stepper issues

[LeoKi]

Printer Model

Voron 2.4 self sourced

Extruder Type

Clockwork 2

Cooling Type

Stealthburner

My voron 2.4 has been working for years without many issues. Recently I started a print without changing anything, not even turning it off and on and the thing crashed while homing. The B stepper stopped moving and made terrible rattling sounds like one of the coils disconnected. The wiring is all fine, I measured the resistance of the coils and the wire and its a very stable 2 ohms on each coil. It is intermittent, like currently it just does terrible layer shifts. I am using a spider 2.2 board and the thing has a stepper driver overheating issues, using tmc2209 drivers with the heatsinks installed properly. Like if I let it sit at hold current without the fans on it will overheat in 30 minutes. I already made a post on r/VORONDesign but I didnt get any answers.

 

[NoGuru]

Did you have a question you wanted to ask?

 

[LeoKi]

Did you have a question you wanted to ask?

Yeah sorry I totally forgot to actually ask lol, I was just gonna put like what should I do to fix this?

 

[Denesius]

If it's happening around the same area I'd start off by making sure there's no binding in the motion system. Not familiar with the spider board, but on my BTT board I had a similar issue where the current for one stepper was over 1.2amps, and the tmc driver would overheat. The driver has temp protection circuit, it would shut off current flow and the stepper then would skip/lag steps and chatter. Try swapping the driver with the A stepper and see if the problem follows the driver or stays put. If it stays put, you have an issue with the motor or intermittent wiring fault. Swap the motors & see. If it follows the driver either reset the current limit (rotate the pot slowly a couple of full turns back & forth to clear) and then set the limit, or try a new driver.

 

[LeoKi]

If it's happening around the same area I'd start off by making sure there's no binding in the motion system. Not familiar with the spider board, but on my BTT board I had a similar issue where the current for one stepper was over 1.2amps, and the tmc driver would overheat. The driver has temp protection circuit, it would shut off current flow and the stepper then would skip/lag steps and chatter. Try swapping the driver with the A stepper and see if the problem follows the driver or stays put. If it stays put, you have an issue with the motor or intermittent wiring fault. Swap the motors & see. If it follows the driver either reset the current limit (rotate the pot slowly a couple of full turns back & forth to clear) and then set the limit, or try a new driver.

I already put in new drivers and it did not help. Its very unlikely that its a mechanical problem, it happens in random places and sounds just like the b stepper loses one of its coils. If I connect another stepper instead of the b stepper while its acting up, the new one will act like it has a disconnected coil. While spinning freely I mean