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Method and generator for electrical discharge machining

  • US 20070039929A1
  • Filed: 07/31/2006
  • Published: 02/22/2007
  • Est. Priority Date: 08/01/2005
  • Status: Active Grant
First Claim
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1. A method of generating a time sequence of EDM pulses having a predefined ignition voltage for electrical discharge machining wherein an AC voltage is generated from a DC voltage furnished by a bipolar current source, said AC voltage is applied to an isolating transformer disposed between said bipolar current source and the spark gap, at least one first pulse capacitor is charged by said bipolar current source to a charging voltage corresponding to the ignition voltage, and said ignition voltage provided by said isolating transformer is switched with a selected polarity to said spark gap.

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