Motor does not rotate or gets stuck?
Whether there is resin leakage into the motor part that can not operate normally, if so, the whole machine needs to be replaced without additional testing.
1.If not, please add lubrication to the z-axis anti-backlash nut and slide rail
Move up and down smoothly and then lock gradually.
2.Turn off the machine, loosen the top, bottom and side 12 screws first,
Check for loose or damaged motor wiring.Try to reinstall the wiring of the motor