Thx Julien,
There seem to be a few informative threads with the right search string.
I guess I could choose to see this as another straw on the pile of excuses I’m building to go to the dark side and CNCjs…
But more seriously, I think it’s worth spelling out to HDZ users that it is possible to physically damage to the home switch just by exceeding the retract limit until there’s a fix with either proximity switches or a mount that’s within the allowable overtravel from the vendor. It might save support some postage on new switches for starters. From experience I know how frustrating it is to not be able to continue because you can no longer initialise your machine after mashing the Z home switch.
The fix being something like “If you are setting a high zero for a tall workpiece or an ‘air cut’ be very very careful with your retract heights in your CAM software and make sure you’re not going to hit the Z limit” - or do what I have done and file off the locating peg on one side of the switch and make the position check a regular maintenance item.