here a part of Mach3Mill_Install_Config Manual Appendix A Torch Height Controls
in Mach3
Notes:
• Turning spindle ON sets the THC correction to zero. Min/Max step counts are then effective from
the current Z.
• Only licensed versions can enable THC mode.
• When in THC mode, motion will not begin until THCON (Torch OK) signal becomes active.
Motion may be delayed by Pierce Delay.
• Pierce Delays tells the system not to move until delay seconds have passed since spindle (torch)
was turned on.
• Config/spindle Torch AutoOff setting shortens delay in takeoff, and also turns off torch automatically
if motion stops.