Need to engrave numbers and lines in soft metal to make the dial in a SEXTANT. I want to use put a punch instead of a cutter in my Mach3 controlled mill, this punch can rotate or not because mainly its going to slide in the metal leaving a mark.

The G-code is generated by CamBam. My biggest problem is that inserting text in CamBam can only be done linearly and not in a not in a semicircle.

Do you know of some manual or tutorial that can help

Thanks for any help,