3.7.1, brand new Einsy board, TMC DRIVER OVERTEMP errors constantly
I have had my MK3 since December of 2017, I almost always print ABS inside an enclosure and have never had problems until the upgrade to FW 3.5.2 and every firmware since then. I had a good solid year of printing with no problems until I upgraded to 3.5.2. After upgrading firmware I would sporadically get the TMC DRIVER OVERTEMP errors during prints. It wasn’t on every print, nor when it happened it wasn’t on a certain layer, there was no relation between prints when they would fail.
Contacted Prusa support they sent me a new Einsy. At about that time I saw others were having the same issue and edited the system_timer file to go back to the old bed heating pwm since that’s what was causing a capacitor to overheat in turn overheating the TMC drivers, so I did the same. Everything was fine until about 2 weeks ago. 3.7.0 firmware and TMC DRIVER OVERTEMP errors were back. Updated to 3.7.1 and every single print would fail with the TMC DRIVER OVERTEMP ERROR. Contacted Prusa again, got a new Einsy, installed it last night, first print the error is back yet again.
Ive tried factory resets numerous times, I’ve reflashed firmware countless times to 3.7.0 and 3.7.1, no difference. I cannot complete a print now without getting the TMC DRIVER OVERTEMP error even on 3.7.1 which is the latest stable release that is supposed to fix this issue. I have no idea what to do/try anymore. The printer has become useless.
RE: 3.7.1, brand new Einsy board, TMC DRIVER OVERTEMP errors constantly
How hot is it inside the EINSY case? How hot is your enclosure?
If despite running firmware that corrects the FET heating issue, you are getting over temps, I would be thinking about adding heat sinks to all four TMC2130's and the heat bed FET. You can see their thermal vias on the non-component side of the board. You will probably need to cut holes in the EINSY case to fit the heatsinks and increase air circulation.
RE: 3.7.1, brand new Einsy board, TMC DRIVER OVERTEMP errors constantly
Just want to note that one person seeing this not too long ago got a shorted/bum motor which would make the driver overheat from current draw, might be worth checking for that.
RE: 3.7.1, brand new Einsy board, TMC DRIVER OVERTEMP errors constantly
How hot is it inside the EINSY case? How hot is your enclosure?
If despite running firmware that corrects the FET heating issue, you are getting over temps, I would be thinking about adding heat sinks to all four TMC2130's and the heat bed FET. You can see their thermal vias on the non-component side of the board. You will probably need to cut holes in the EINSY case to fit the heatsinks and increase air circulation.
While this shouldn’t be a problem for me to do I am still trying to figure out why my original MK3 einsy worked for almost a year in the same conditions, damn near daily. Second einsy worked for 3-4 months. Now the third einsy won’t even give me 1 complete print without failing and giving me the TMC DRIVER OVERTEMP error. When I get a chance I’m going to try putting 3.5.1 back on the printer and monitor the temps. Something still seems like it’s causing the capacitor by the TMC drivers to overheat maybe not as fast as before. Looking back at the 2 einsy boards I’ve replaced on the printer, nothing looks burned/damaged even the capacitor people have singled out to be the issue here.
RE: 3.7.1, brand new Einsy board, TMC DRIVER OVERTEMP errors constantly
Just want to note that one person seeing this not too long ago got a shorted/bum motor which would make the driver overheat from current draw, might be worth checking for that.
I’ll have to look into that and ways to test the motors. Cause I almost feel like this may be my issue especially since a brand new einsy board is in the printer now and the very first print a few hours in failed with the over temp error