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Electric discharge machining power supply circuit

  • US 4,978,829 A
  • Filed: 05/25/1989
  • Issued: 12/18/1990
  • Est. Priority Date: 05/27/1988
  • Status: Expired due to Fees
First Claim
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1. A control circuit for electric discharge machining, for supplying current to a spark gap between a workpiece and tool, comprising a DC source, an inductive circuit connected to the DC source through regulating means arranged to maintain a constant current in the inductive circuit, switching means connected to the inductive circuit and to the spark gap and operable to divert the current in the inductive circuit to the spark gap, and means for establishing a predetermined voltage across the switching means and spark gap.

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