This may not actually be a 'Mach' problem, more, a computer problem. On occasion, when I fire up my computer to tinker with my Taig mill I will have no Z axis control... it's just dead. The Mach DRO shows movement but I don't think the signal is getting to the machine power supply. Sometimes, rebooting will bring it back, sometimes it takes several reboots. Last night I gave up after a half dozen reboots. The diagnostics appear to check out as does the printer port. I've even tried wiggling the cable to see if I can get it to respond to no avail.
Any thoughts?
Cheers,