My machine loses the x,y, and z zero after a few minutes of work. please provide a remedy to fix this issue. Thanks

Try reducing your Velocity and Acceleration settings by 50% in Motor Tuning and apply the changes for each axis. If this resolves the issue then increase your Velocity and Acceleration setting in small steps (using 'trial and error') until you get the best performance consistant with reliable operation.

Tweakie.