Homebrew PCBs

--- In Homebrew_PCBs@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> Hi Curt,
> 
> Interesting idea, but I'd be concerned about the contamination of 
the
> board with the arc eroding of the isolation cuts.
> 
> Alan  KM6VV

Hi Alan,

        The effluvium would be colloidal copper in water.  It should 
clean up when you scrub the board prior to plating ( I think!? )

        I was thinking using water pumped through a grounding sleeve, 
which would make certain of return path for the spark and also 
constantly flush the eroded copper from the board.  Since the 
electrode would be a mechanical pencil lead, the sleeve would small 
and the dielectric flow would be limited.

         The software would have to cut the isolated areas first ( 
i.e. inputs in guard rings and drill center pips in pads ).

CWR