Electric discharge machine power supply

Details Electric discharge machine power supply Electric discharge machine power supply

2006-12-05

2006-12-05

Evans, Geoffrey S. (Department: 1725)

Electric heating

Metal heating

Cutting or disintegrating

Reexamination Certificate

active

07145096

ABSTRACT:
An electric discharge machine has a main power supply and a sub-power supply connected in parallel across a gap formed by an electrode and a workpiece. A voltage is first applied to the gap from the sub-power supply, and then machining energy is supplied to the gap from the main power supply when detected that the gap voltage has fallen to or below a certain detection level. Stable machining is achieved by changing the detection level according to the machining state.

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