Hi
Firstly let me say I'm a newbie on this site (found it by accident actually, looked useful, and I signed up!)

ProtoTrak software: I have used this on industrial machines (KRV 3000/PRO3000 milling machines with ProtoTrak MX2 control), and as stated, it simply requires co-ordinate positions entered. Don't know of any retrofits (or otherwise) on hobby machines - I think the cost is probably prohibitive.

The system is designed for prototyping / low volume (easily programmed), and I think (I may be wrong) the underlying system is based on Fanuc controls (shall attempt to find a link).

*Apologies for dredging up an old thread*