There are 3 reasons for the abnormal movement of the Z-axis
(1) The top of the Z-axis screw is loose. Please reinforce the screw at the top of the Z-axis
(2) Z-axis motor has loose connections. Please open the base to re-plug the motor cables
(3) Z-axis screw needs lubrication. Please add oil to the Z-axis screw.
Posted in: Mankati Fullscale XT