Hi Alan,
I think Denny nailed it! Yes I am talking isolation. You
only etch a thin line between traces. Or you can have the point
go around a second time and make the isolation wider. Second option
is a wider tool. The coating Denny is using does not need
burnishing. If you have worked sheet metal, there is a coating you
put on the metal. Then you scribe you layout lines. The lines show
up against the dark coating. This is methode can be used to make
very precise parts.
John
--- In Homebrew_PCBs@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> Hi John,
>
> I recall the JFax, and AEA's fax. Milling PCB's is quite a
challenge,
> and even more interesting!
>
> I didn't quite get the "scratch and etch". This is for isolation,
like
> milling? Just enough to remove resist?
>
> What about a burnishing bit, perhaps abrasive, to scrub off
resist? It
> would have to be quite small dia. Just mill through the resist.
>
> Alan KM6VV
>
>
> crankorgan wrote:
> >
> > Alan,
> > Ralph had a BBS that I used to visit. I drew up his
> > ZipZap antenna as a ZIP package. Fax Dahl was software
> > that would turn Fax audio from my R71a to VGA images.
> > Later on there was a German Freeware program that would
> > work through the serial port with only a few resistors
> > and an opamp. If you do a search for Kleinfax on the net
> > you may find my diagram for turning a serial board into
> > a radio fax board. JFax killed my design off! I think
> > later versions of HamCom did fax too! That was a long time
> > ago.
> > After using steppers to spin my drum, I made a spinning
> > mirror camera like the ones the satellites use. Now I use
> > steppers to run my PCBMill. I mill circuit boards as part of
> > my business. There is no cheap way to make a 4" x 6" board. I
> > stick with the milling process because it works best for me.
> >
> > John
> >
> >
> > --- In Homebrew_PCBs@y..., Alan Marconett KM6VV <KM6VV@a...>
wrote:
> > > Hi John,
> > >
> > > Yes! I have Taggert's book, and I played around with weather
> > fax's, but
> > > AFTER CRT's were common. what is FAX_Dhals? A software
package?
> > >
> > > 73's,
> > >
> > > Alan KM6VV