Herbert,
I am building my second router now - the first one is a larger
woodworking router, this one is a small one for PCB milling and
drilling.
You can build something with as much precision as you would like, it
just depends on budget, knowledge, and the components selected for
the task. Both of my machines use both wood and aluminum as well as
other materials.
Myself, I avoid dremel type tool at all costs as they really don't
have good, true running spindles nor are they "quick change" as
standard.
Chris
--- In
Homebrew_PCBs@yahoogroups.com, "Herbert E. Plett"
<cachureos@...> wrote:
>
> does anybody have/use a wooden CNC router (DIY) with a Dremel for
punching
> holes into a PCB?
> repeatability - accuracy - over all precision?
>
> is the Dremel run-out good enough for 20 mil (0.5 mm) bits? or
what's the
> minimum non breaking size?