Homebrew PCBs

Hi guys,

About a year ago or so there was some talk of using EDM for 
isolation milling and such. Stefan was tinkering a bit with it and 
another fellow did some heavy, indepth work in the process, 
including making a power supply to do the grunt work.

I remember the initial approach was to use a bitmap image for 
processing of the machining.  There was a good reason why this 
approach was used and I don't recall why - does anyone remember?

Last night I was giving thought to this process. The one problem I 
see with EDM and isolation milling is keeping the PCB conductive.  
For example, if the output from the isolation milling routine 
creates and island in the middle of the board - then further 
machining needs to be done in that island area, it would no longer 
be conductive.  So I suspect that is part of the problem with using 
vector data as opposed to bitmap data.

Chris