--- In
Homebrew_PCBs@yahoogroups.com, Adam Seychell <a_seychell@y...>
wrote:
> I've never tried electroetching, but I'm curious what the etch
> uniformity is like for a simple (homebrew style) electroetching
setup ?
This idea has been sticking in my mind as well.. The lack of lateral
forces (I assume) makes it attractive for low cost CNC.
As to the uniformity, it pops into my mind that low voltage, high
amperage would result in a very short, but powerful spark which would
only remove the copper very close to the electrode. A higher voltage
spark would jump farther and potentially vary more. That is not based
in experience, but just an educated guess.
I'm trying to hint for a small welder to show up under the christmas
tree at the end of the year, but I wonder what I could experiment
with
before that on a very limited buget. Any suggestions? Old car
battery?
I could use a car battery charger... Wonder if I could kill my
alternator by playing about with the jumper cables? <GRIN>