Abstract
In EDM (Electro discharge machining), uniform scattering of micro craters by discharge makes it possible to machine the surface of the workpiece uniformly.
We examined the main factor of the separation of craters created by repeated pulse discharge. We dealed with the phenomena of the creation of two craters by successive two discharges under various discharge conditions.
Experimental results show that the distance between craters is influenced by the pulse interval, the discharge energy, and the gap length. And we concluded that the main factor of the separation is the behavior of the bubble created at discharge.
