I just completed building my K8200 kit and everything works fine, except of the extruder stepper motor.
It does not turn but “rattle” around.
If i connect the Z motor to the Extruder plug on the mainboard the Z motor works ok on that.
If i connect the extruder motor to the Z motor plug it stil rattles.
So i think the Drivers and the Mainboard are ok.
if i help the motor by turing it manually with very light force ist turns, but very noisy.
I checked the Cable colors of my extruder Motor wiring a dozen times.
It is connected exactly as the manual says.
But i still think Ther is a mismatch in the Wiring.
Can anyone point me out which color of the extruder Motor Wires should be connected to which pin on the mainboard socket?
This would make measurements much easier.