Hi John,
OK, I know what you're talking about. I don't know if it has a
different designation, 'tho (must be some kind of glass epoxy).
Yeah, there are a few. The numbers are going down. One is on the other
side of the parking lot from us. Convenient! I could use more METAL
suppliers, 'tho. Probably because I'm just not as familiar with them.
Alan KM6VV
crankorgan wrote:
>
> 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
>
>
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