MK4 - Error Homing Z Axis + Melted Bracket
Hello All,
I'm having an issue with my Mk4 that I can't figure out. There are several issues and I'll dive in, in no particular order.
Z Left motor stays very hot while the machine is switched on. It's been so hot in fact, that it melted the plastic bracket that holds it to the frame enough that the bolts connecting it to it sagged down a few millimeters (these the also the adjustment bolts that align the long z screw). After opening the motor itself, I can see some small burn marks on it. I just replaced the motor and the bracket but it is still doing it.
Whenever I try to run a self calibration it will fail during the Z axis test. The machine will complete the x and y axis tests just fine, but then begin to do a jittery move on the Z. By this is mean it will move upwards about an inch or a couple of centimeters and pause. It will repeat that a few times and then reset itself and present an error "homing error Z - 13301".
I've lubricated the lead screws, and flashed the firmware but no dice. Anyone have any idea what could be happening?
RE: MK4 - Error Homing Z Axis + Melted Bracket
I'd recommend to contact prusa support. There is no normal condition where the motor gets so hot that melts parts around it.