Geeetech

Hi,is your z-axis installed correctly and is the threaded rod bent? Whether the brass nut is installed too tightly, the coupling is installed correctly, and the left and right z-axes are on the same plane. If the motor itself cannot run normally, you can try to exchange the motor wire to see ...

The problem is that the motors that move the z axis do not have enough force to lift the extruder and generally lose steps, lower well, the extruder also does not have force, so I have to put it at high temperatures and low speed so that it does not lose steps