Homebrew PCBs

On Fri, 01 Jul 2005 06:48:17 +0200, mikegw20 <mikegw20@...> wrote:

> EDM? I had a quick search in the messages and I get the feeling it is
> some sort of electrode ablative process.  Does someone have a link or
> two that spells it out so I don't have to pester you with silly
> questions.
> Thanks
> Mike


Yes it is electrodynamc milling.
Basically a series of sparks eordes the workpiece.

It is done under a fluid (water or special oil), and there are many  
different methods (wire EDM, sinking, ...).

The advantage over mechanical milling would be way better resolution, no  
expensive cutters to buy that dull quickly.
No cutting into the epoxy, the result wold look just like chemically  
etched.

I've seen a few machines in a factory and was intrigued by it ever since.


ST