Preheat is NORMALLY done in the G code side and is handled by the CAM package.

(;-)TP

You can use one DRO and make one equation between the pierce delay and time to wait preheat! It's more usefull

No man, you can make on main screen var input with 4 digitals for ex, and there before start cut, enter the thickness of material that you want to cut, and on the macro code make an equation to determine how much time it's take to be ready to cut

Best regards!