#X and Y motors go 'brr' when bed is over 55C

1 messages · Page 1 of 1 (latest)

coral drum
#

So I have a strange issue that started earlier today after a failed print.
If the bed is over 53C and I do a homing, the X goes to 0, the Y goes to 0, then the X and Y are going to the middle for Z homing. However, both X and Y steppers go 'brrr' for a second before going to the middle.
If I lower bed temp to <53, all is fine.

I measured the power into the MCU to see if it might be the PSU failing to deliver full power for a while so the motor do not turn as it should but just vibrate, but there is no dip.

I am kind of out of ideas. I have shut everything down in a desperate hope that maybe the MCU is a tad too warm or something like that, but I doubt it. The MCU is not even close to the bed so the heat from it can not affect the MCU.
Nothing have changed since the failed print. However the failed print was a strange layer-shift where it seemed to shift a bit each layer, all in the same direction, then stop after a while. So not sure if the 'brr' thing with the motors happened to the Y during that time and that is the reason.
None of the motors are hot and both got heatsinks on them.

I use Klipper and the loggs are checked and nothing is showing there, either strange things for power or that the motors act up.

Heating the Nozzle only do not give any error.

Things to do is to pick the cables apart and plug them back in, measure on the motors while the error happens, something that is not the easiest as it would mean I have to split the wires open, but might be what needs to be done.

Any ideas? Suggestions?

Easiest "fix" is to start printing with bed temp 55, but would be nice to know what is wrong.

split iceBOT
#
AI Help

It sounds like the issue you're experiencing may be related to the stepper motors on your printer. The fact that the problem occurs when the bed temperature exceeds 55C suggests a possible connection with motor overheating or a power-related issue, even though you've ruled out the power supply.

Here are a few troubleshooting steps you could consider:

  1. Check the stepper motor drivers: Ensure that the stepper motor drivers are correctly set and not overheating during operation. You may need to adjust the current settings or add additional cooling to prevent overheating.

  2. Check motor connections: As you suggested, inspect the motor connections for any loose wires or damaged connectors. Re-seating the connections could potentially resolve the issue.

  3. Test with a different temperature sensor: It might be worth trying with a different bed temperature sensor to rule out any sensor-related issues impacting the motor behavior.

  4. Review recent changes: Consider any recent changes ...

WARNING: This response is AI generated and may contain errors.
split iceBOT
#
This post has been closed due to inactivity.

This post has been inactive for over 1 hour and so has been closed. To reopen this post simply send another message.

coral drum
#

.