Hi Jon,

That certainly sounds doable, but having the right cutter is important. Long shanks lend themselves to deflection that will ruin your precision. And I don't know about your machine, but mine has far too much backlash to do PWBs. Oh, it corrects for backlash during machining, plus I have ball lead screws, both of which makes my little machine quite nice for normal machining (I can't imagine trying to machine a hyperbolic surface without CNC capability), but it doesn't compare to the precision of my LPKF. Of course, my LPKF could never produce enough torque to mill a piece of stainless steel either.

Anyway, I haven't heard back from the guy I mentioned earlier, but I did send him a link to your original post. I know he has a camera he sells to make vison based corrections for producing high precision work on normal milling machines. I bought one of his cameras for doing inspection and measurement. There's a chance he may have something that can help you out. Even if you use software from somewhere else to produce the G-code, his camera and vision correction software may well be useful. If it will enable you to do what you're trying to do, I promise you it'll be a lot cheaper than buying a dedicated PWB mill.