Homebrew PCBs

n4onl wrote:
> 
> Hi everyone.
>  Just found this group and I have been skimming through the posts.
> I'm interested in building a CNC PCB mill/drill. Stepper motors,
> linear bearings/rods, antibacklash nuts on Acme rod... and a Black
> and Decker RTX. The resolution works out to 0.0005" per full step and
> 0.00025" if I half step.
> 
> Is 1/2 or 1/4 of a thousands a good resolution for this project?
> 
> Does anyone have links to similar projects?
> 
> Hints? Tips? Insight?

There's a home-brew cnc yahoo group: cad_cam_edm_dro.