Problems in calibrating Nybble
In System menu com 4 is found and seems to work correct. The firmware-uploader seems to work correct as well.

but wen I try start the joint calibrator, this happens :-(

what do I make wrong? what do I have to do?
Thanks - Stefan from Germany
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Make sure you check the ligics of calibration and follow the instructions.
https://docs.petoi.com/joint-calibration