Probe fails with stepper error on BTT SKR 3 EZ and SuperRacer

General Discussion
1

Basic Information:

Printer Model: FlSun SuperRacer
MCU / Printerboard: BigTreeTech SKR 3 EZ
Driver: EZ2130
klippy.log
klippy.log (63.5 KB)

Hey everyone,

today I swapped the BigTreeTech SKR 3 I had installed with a new SKR 3 EZ and different drivers. Prior to the switch it worked fine but was rather loud. After the switch I get a weird error when using the BED_MESH_CALIBRATE command. The printer homes fine and moves fine, up until the probe is used. When the probe starts to be used I get the following error:

Probing failed due to printer shutdown
TMC 'stepper_b' reports error: DRV_STATUS: 88140000 cs_actual=20 s2ga=1(ShortToGND_A!) stst=1
Once the underlying issue is corrected, use the
"FIRMWARE_RESTART" command to reset the firmware, reload the
config, and restart the host software.
Printer is shutdown

What confuses me, the steppers and drivers work fine, since the SuperRacer effector moves just fine. Does anyone know what the issue might be?

Greetings
DerKnerd

2

When I disable stealth_chop it works. I need to play a bit with that setting.

3

This is an error that is reported by directly by your TMC driver and Klipper is only reporting it. Usually this kind of errors point to an issue with either:

  • the stepper
  • the TMC driver
  • the wiring
  • in stealth_chop mode, when the TCM fails to identify the needed current

Also see TMC drivers - Klipper documentation

4

I replaced the EZ2130 with EZ2209 and now it works fine.