Ah, couldn't remember of the top of my head what that was. However, I'm not sure that an incremental move up is always going to be a safe thing to do - what if the Z axis is less than 50 from its limit position? Absolute, not incremental, and machine not work coordinate move to top Z value might be safer. And making sure that right units are being used, although maybe this controller is fixed metric-only. I'm used to Mach3 where units might change and my own tool-change macro uses more code checking and setting/resetting machine parameters than it does doing the actual work involved!