PCB milling machines??

[Ingo Debus]

John Speth wrote:
> 
> I was paging through Electronic Design and saw a couple of ads for desktop
> PCB milling machines which basically goes from Gerber to drilled PCB by
> milling away copper and drilling holes.  Has anybody used these or know
> anything about them.

Yes, I used one from LPKF at work years ago. It was a quite old machine
from 1985 or so. It could do double sided PCBs with about 0.3mm minimum
trace width and about 0.3mm minimum distance between adjacent
traces/pads. So one trace between two pads of a DIL IC was possible.
AFAIK today's machines are much better.

Ingo