Arnie,
A mechanical etch bit will do two 4" X 6" boards with lots of
traces if you run it at 16,000 rpms with a 6" feedrate. If you
increase the rpms you might see runout in the motor tool. Runout is
the slop in the bearings along with a poorly balanced armature. You
will also see bits break. The bits are solid carbide and the tip is
very thin. The tip is shaped like a drill bit. Three drops of motor
oil spread on the board will keep most of the dust down. I have
pictures of my milled boards in the pics section.
John
--- In
Homebrew_PCBs@yahoogroups.com, "acfrankenberger"
<acfrankenberger@y...> wrote:
> Sorry for not being clear in my first post.
> I am actually planning on using a separate spindle (a dremel like
> device) attached to the Taig. It will do up to 30,000 RPM.
>
> Thanks,
> Arnie
>
> --- In Homebrew_PCBs@yahoogroups.com, "crankorgan" <john@k...>
wrote:
> > Arnie,
> > The spindle speed on the Taig is toooo slow. You need
16,000
> > rpms to mill circuit boards at 6" per minute using a two fluted
> > mechanical etching bit. What is your top speed 10,000 ?
> > John
> >
> >
> >
> >
> > --- In Homebrew_PCBs@yahoogroups.com, "acfrankenberger"
> > <acfrankenberger@y...> wrote:
> > > I have a Taig mill I was hoping to use to mill out (trace
> > isolation)
> > > and drill some circuit boards. Would phenolic based boards make
> the
> > > milling process less demanding on the tool bits? Could I avoid
> > dust
> > > collection?
> > >
> > > Does anyone have a source for phenolic copper clad boards?
> > >
> > > Thank you,
> > > Arnie