Homebrew PCBs

Hi,

google turned up a discussion here and in EDMHomebuilders about EDM fabrication of PCBs 6-7 years ago, but surprisingly little else.

I'm particularly looking for information about pulse voltage & current profiles and repetition rates required to allow me to design a power unit.

Can anyone point me to such data?  

The concept is have a single CNC XYZ table w/ interchangeable heads for plastic extrusion, drilling, etching, solder paste application, pick & place, etc.

Have Fun!
Reg