Homebrew PCBs

Roger, I am not real familiar with EDM, but I do recall that the two 
materials used for electrodes were carbon (for sinker types) and 
Brass for Wire EDMs.  

In the case of what you are doing, it fits into the realm of a 
sinker type EDM.  I vaguely recall them using a sinker EDM machine 
to drill some small holes in some very hard metal. I believe they 
used a carbon electrode for that too.  Sorry I can't offer more, it 
was about 18 years ago I was involved with that company and no 
longer have any contacts in the EDM field.

Chris


 
> Roger
>  
> --- Stefan Trethan <stefan_trethan@...> wrote:
> 
> > Good to hear you got such good results.
> > 
> > I don't have any specific concerns why it would not
> > work, never had after  
> > some manual tests with a simple power supply.
> > 
> > But i don't currently have the time to build a CNC,
> > although i have most  
> > components set aside for a while now.
> > 
> > The electrode erosion thing was discussed back then,
> > if i remember  
> > correctly the thinking was that one would advance
> > the electrode until a  
> > spark of the correct voltage is occuring. One would
> > need to decide if the  
> > energy was sufficient to blast out the pixel or if
> > it must be re-done.
> > But your approach seems a good idea also.
> > 
> > Keep us updated, i definitely plan to build the CNC
> > but it will be months  
> > for sure. If i use it for drilling of inkjet printed
> > PCBs or if EDM will  
> > be an option is to be seen.
> > 
> > what material is your electrode wire made of?
> > 
> > ST
> > 
> > 
> > On Tue, 02 May 2006 18:07:19 +0200, roger lucas
> > <ralucas4277@...>  
> > wrote:
> > 
> > > Well, I finally motivated myself this holiday
> > weekend
> 
> 
> 
> 	
> 	
> 		
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