If you are using SheetCAM then the settings need to be put in the Tool Chart parameters. The SwitchOffset variable in the POST should be edited and changed to your actual switch overtravel value on the floating head. You can't use the MACH macro's and settings in SheetCAM. I have no idea why Campbell Designs still has the elements on the screens or the macros. You don't need pierce delay if you use the Arc Good sensor and the THC logic in MACH. It automatically holds motion until an arc is established.