Homebrew PCBs

Hi Denny,
         The acid will also stay strong because there 
is less copper etched when doing isolation. I use the 
Think and Tinker bits. They only last a little while 
longer if you hit just the copper. I did all kinds 
of tests trying to reduce my costs so I could see 
circuit boards to the public. Hopefully someone 
gives the Scratch and Etch a real test!
    
                                   John

--- In Homebrew_PCBs@y..., milwiron@t... wrote:
> 
> I'm finding John's idea pretty intriguing.
> Just to take the brainstorming another step: 
> One big problem with PCB routers is tool life and their cost.
> But using a CNC router with a cutter to just cut through the 
surface of the
> resist and a thou or two in to the copper would prolong the life of 
a
> carbide tool immensely... and produce a board that should etch 
quickly and
> cleanly.
> Yes it would be better do away with etching all together but a 
marriage of
> the two technologies for some applications could be useful.
> Denny
> 
> 
> At 02:35 PM 04/05/2002 -0000, you wrote:
> >Hi,
> >   Nobody liked my light on a plotter idea. I was told the
> >light source would have to move too slow. The board would take
> >way to long. Ok, I use Mechanical Etching bits myself. But what
> >if you coated the whole board with resist. Then you put a sharp
> >point in the plotter. Have the plotter do isolation paths. Then
> >the board goes to the acid.
> >
> >                                          John
> >
> >
> >
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