Bit off uccnc topic....
Whilst on my travels of finding feedrates and inverter igbt frequencies in the hyperthem operator and service manuals, I came across their newest offering manuals for the pmx45xp
I noticed they have a section on plasma Marking / engraving with suggested feedrates and settings.
Thought this may be of use to some of the forum readers for ideas in this aspect for your setup.
I've only used the centre punch (drill point marking) routine before but thought this info may be useful too for another tool setup in sheetcam.