I have wanted to make my self a precision 4 axis WEDM for about 12 years now (ever since I heard of them), now I think I am ready mentally to attack the project. I have questions about them and hope the plethora of collective knowledge demonstrated by this forum can help me in my terrible quest!

So to start off!

I know that the key to a good EDM is the power supply, in your experience what makes the perfect setup? Will a quick discharge like a capacitor discharge suffice? Or would it require a constant arcing that which can be found with a current controlled square wave?

Is there more to an EDM power supply then frequency control, voltage control, and current control?

I was thinking of making a power supply that can go to 100 KHz PWM voltage control and capacitive current control. I would like to use a variety of wire but preferred .003" I am not sure about the optimum power but would build it to 1000 watts, is this enough?

a diagram of the power supply:

220V filtered DC
|
V
Switch <--- Square Wave generator 0 - 100Khz PWM V control
|
V
Switched Capacitor Bank <---- Digital Bank control for power of spark
|
V
Wire Cutter

Any help would be great! Thanks!

Cheers!

http://www.cnczone.com/forums/plasma...-wire-edm.html