Tmc error ( undervoltage)

General Discussion
1

Basic Information:

voron 2.4 with sb2040 pro (mellow)
Btt Ocotpus
Rpi 4b
Klippy log provided into the zip file (was too big)
klippy.zip (2.1 MB)

Hi, i’ve a voron 2.4 with stealthburner and a sb2040pro mellow, yesterday the printer was going fine, today after starting 2 print, randomly i get this error.

TMC 'extruder' reports error: GSTAT: 00000004 uv_cp=1(Undervoltage!)

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

the driver works fine, and also the extruder motor, someone has an idea about this error? i’m going crazy, maybe i need to ground the motor?
Yesterday it has printed for 8hr without any issue, today i cannot print nothing, that randomly the error appear.

Thanks in advice to all can help me!

2

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