Hi Alan,
The board is the same type as used in a PC power
supply. It has a red logo or something in the board every
few inches. Sounds like you have lots of places near you.
I only have one surplus place near me. Mostly computer
parts.
John
--- In Homebrew_PCBs@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> Hi John,
>
> Light brown? On the un-clad side? Is it G10? Can you see the
glass
> strands, looks like a weave when you machine it? I can get single
or
> double sided board here for $0.02 (two cents) a sq in. That would
be
> $0.48 for the board you mention. Looks a little GREEN after you
machine
> (or etch) the copper off. Phenolic is BROWN. Chips are slightly
> yellow-ish. I believe FR4 is blue?
>
> Alan KM6VV
>
>
> crankorgan wrote:
> >
> > Hi Alan,
> > The board I am using costs $2 for a 4" X 6". I suspect
> > there is a better board out there. The board I use is a light
> > brown color.
> >
> > John
> >
> > --- In Homebrew_PCBs@y..., Alan Marconett KM6VV <KM6VV@a...>
wrote:
> > > Hi John,
> > >
> > > I guess I'll have to do that. I've used cardboard baffles to
keep
> > brass
> > > and aluminum dust/chips down, they normally just collect beside
the
> > mill
> > > in the tray the mill sits in. I got a STACK of dust (and some
blew
> > > around) from a PCB the size of a QUARTER!
> > >
> > > What do you think of Phenolic board? Can you use it? MUCH
> > cleaner, and
> > > nicer on endmills!
> > >
> > > I'm also thinking I might set up a small "hand vacuum" to keep
THIS
> > dust
> > > down.
> > >
> > > Alan KM6VV
> > >
> > >
> > > crankorgan wrote:
> > > >
> > > > Hi Alan,
> > > > I put a wall of masking tape around the edge of the
> > > > PVC bed. This keeps the dust from vibrating off the bed into
> > > > the leadscrews. Since I went back to 16,000 RPMs the dust
> > > > is not so bad. The best fix is to put 5 drops of motor oil
> > > > on the board. Spread it around with your fingers. This will
> > > > cut down most of the dust. Then wash the board with dawn
> > > > dish detergent. If you think that dust is bad,try sanding,
> > > > cutting and shaping MDF wood. Then some PVC! I have it
> > > > everywhere!
> > > >
> > > > John
> > > >
> > > > --- In Homebrew_PCBs@y..., Alan Marconett KM6VV <KM6VV@a...>
> > wrote:
> > > > > Hi Listies,
> > > > >
> > > > > I had the opportunity to mill some more PCB material this
last
> > > > weekend.
> > > > > Phenolic and G10 Gass Epoxy. Boy does the G10 make nasty
dust!
> > > > John,
> > > > > how can you stand it! I had been cutting up scrap phenolic
for
> > > > testing,
> > > > > but ran out.
> > > > >
> > > > > And I think I just discovered something, if phenolic board
is OK
> > > > for the
> > > > > circuits you want to do, the cutters PROBABLY won't get DULL
> > nearly
> > > > as
> > > > > fast! And it's a lot cleaner. I LOVE G10 and FR4, but
maybe
> > I'll
> > > > try
> > > > > to find some more phenolic board (single sided is fine)!
> > > > >
> > > > > Alan KM6VV