Homebrew PCBs

I read it to be Electrical Discharge Machining.
http://www3.telus.net/public/aschoepp/edm.html

Regards,
S.Ramamurthy

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@g...> wrote:
> On Fri, 01 Jul 2005 06:48:17 +0200, mikegw20 <mikegw20@h...> 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