Generator for electric discharge machining of metallic work pieces by means of an electrode consisting of liquid or solid material
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United States of America Patent
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-
Dec 15, 1992
Grant Date -
N/A
app pub date -
Dec 10, 1990
filing date -
Jun 9, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An impulse generator for the spark erosive cutting of workpieces by electrodes of a liquid or solid medium, consists of a control circuit and a principal circuit. The control circuit contains: the control circuit contains an oscillator, reduction stages for the generation of elements which belong to the impulse signal, a counter for the addressing of impulse signal, a memory of a feedback circuit which detects the electrical conditions in the working gap, and a ROM with programmed memory locations, which are addressed by the counter according to the addresses of the impulse elements and by memory according to the addresses of the electrical conditions in the working gap, whereby the contents of the memory locations generate an output signal or no output signal. The principal circuit contains two electronic switches for the generation of a working impulse in the working gap when an output signal is present, and a control circuit which inhibits only one of two electronic counters.
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