Homebrew PCBs

Mike,
     I do the outlines in TurboCAD. I put a dot in each pad. During
milling the bit leaves a starter hole.I then use a Dremel Drill press 
to finish the holes. You could also put your hole locations in a new 
layer. Use the new layer that contains the hole locations and use G80 
to G83 drill commands to do your holes. Excellon is a type of CNC 
file so is a GCode. Both can produce the same results.

                                       John



--- In Homebrew_PCBs@yahoogroups.com, "Mike Putnam" <circuit@g...> 
wrote:
> 
> > Mike,
> >      I ment the ones about payments. He tracked down my website. I
> > did not mention it. If you go back through the messages you will 
see
> > I talked about milling circuit boards here before.
> >
> 
> Didn't offend me. Seemed more on topic than some of the other 
things I have
> seen exhausted on this site for two weeks at a time.
> One question, though... What software do you use for your CNC 
projects? It
> has been my experience that this is the hardest part to putting a 
CNC drill
> together. Most CAD programs output Excellon files. Are you using 
generic
> shareware like DanCad and similar or have you written a custom 
program?
> -Mike