Ah right - with you.

Yes - *usually* - after you've done your IHS and then retracted to pierce height you'd fire with M3. In Mach some leave M3 as it is and just have the default DoSpinCW() which will fire your torch via your relay or whatever OR as I prefer - change it to activateSignal(OUTPUT?) - simply because it doesn't have the slight delay that DoSpinCW() has even when you set it to zero - but that's another story.

Cheers

Ian