Plasma floating head...

[stirling]

FWIW - the *conventional* way of doing this is to use gcode IHS (Initial Height Sensing). No reason why you shouldn't use a/the M3 macro - just saying that it's *usually* done in gcode.

One thing you might want to consider if you go the macro route is you'd really need to pass a parameter to M3 because your pierce/cut heights will differ depending on what material type/thickness it is you're cutting. You're then going to have to mod your SCam post to pass this/these params and.... well you might as well have used one of the posts supplied by SCam in the first place that do all this for you. At the end of the day there are many ways to skin this puppy but why re-invent the wheel?

[JAZZCNC]

FWIW - the *conventional* way of doing this is to use gcode IHS (Initial Height Sensing). No reason why you shouldn't use a/the M3 macro - just saying that it's *usually* done in gcode.

One thing you might want to consider if you go the macro route is you'd really need to pass a parameter to M3 because your pierce/cut heights will differ depending on what material type/thickness it is you're cutting.

Wouldn't need to pass anything to m3 because G31 was just being used to set Z zero to height of material rather than using G92 coordinate offset. Difference being some error checking and intelligence could be applied.! The pierce height etc would still be in G-code.

But like you say more than one way to do it and if does the Job then great.