The Virtual Machine Shop

shift machine coordinate system

G53 is the machine coordinate system. When a workshift (G54) is called, the actual amount of the shift for the G54 origin is relative to the G53 origin (X0Z0). This is why commands prefaced with a G53 cause direct movements that are not subject to any workshift that might happen to be in effect. So a G53 X0Z0 always will position the machine to the same position relative to the machine, not relative to the work.