Electrical discharge machining power supply with digitally...

Details Electrical discharge machining power supply with digitally... Electrical discharge machining power supply with digitally...

B - Operations, Transporting

23

K

327/29

B23K 9/00 (2006.01) B23H 1/02 (2006.01)

Patent

CA 1114026

ELECTRICAL DISCHARGE MACHINING POWER SUPPLY WITH DIGITALLY CONTROLLED ON AND OFF TIME AND PROTECTIVE SYSTEM Abstract of Disclosure A digitally controlled and free-running multivibrator for the power supply is used to supply machining power pulses of predetermined ON and OFF time duration. The pulse output from the digital multivibrator is passed through at least one intermediate drive stage to trigger an electronic output switch, which is operatively connected both to a main DC power source and the gap, to actually provide the machining power pulses thereto. Responsive to a predetermined drop in gap voltage, a digitally predetermined extended OFF time is added.

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