What does the error "M7075-Z axis return to origin time has timed out, please check whether the slide table is abnormal or stuck" mean in the context of the KM-ASSYM1-01 machine? 

When this error occurs, what should the operator
To resolve the M7075 error where the Z axis return to origin has timed out, make sure to check the slide table abnormality or sticking condition. If it is normal, the problem may be with the encoder or the