[sdiy] Non-chemical PCB production???

[Jay Schwichtenberg]

As mentioned in another post the mass of the drill is critical. A drill is
going to weight a lot more than a pen and those little solenoids probably
can't handle it.

A number of HP plotters had a speed mode. You would set the speed and then
tell it to draw. There were different pens that you could use which required
different speeds and speed was used to control the quality of the drawing.
Somewhere out on the net you should be able to find the spec for HPGL.

A guy that worked for us had a commercial machine that did PCB 'routing'.
The biggest problem he had was it required sharp bits and they didn't stay
sharp long cutting fiberglass. He went though a lot of them and that was his
biggest expense.

Good luck.
Jay