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Stepper motor currents

The motor current adjustment pots on the stepper motor drivers are all set to the middle position from delivery. During operation I encountered from time to time knocking sounds from the extruder motors (especially on high printing speeds) and also I had a few lost steps of the delta tower motors.

So I increased the motor currents and had since then none of the reported problems any more.

See the image below:

Trimmer adjustments for good motor currents – the yellow bars are parralel to the flat part of the trimmer slider