A small, friendly subset. Almost everything is G1 linear moves (coordinated straight cuts) with a feedrate — there are no arcs or tool changes. A hot-wire job is basically: turn the wire on, dwell to pre-heat, run a series of G1 moves that sweep the wire through the foam, then turn the wire off and return home.
https://cncfoam.com emits exactly that: M-codes to switch the wire (heat on/off), a G4 dwell for pre-heat, and G1 moves on the X Y U V axes at your chosen feedrate. It deliberately avoids rapid G0 moves so the wire never races cold through foam. The result is readable, portable, and easy to sanity-check by eye.
https://cncfoam.com emits exactly that: M-codes to switch the wire (heat on/off), a G4 dwell for pre-heat, and G1 moves on the X Y U V axes at your chosen feedrate. It deliberately avoids rapid G0 moves so the wire never races cold through foam. The result is readable, portable, and easy to sanity-check by eye.