Method and apparatus for controlling generation of machining pul

Details Method and apparatus for controlling generation of machining pul Method and apparatus for controlling generation of machining pul

1975-12-29

1976-10-26

Reynolds, Bruce A.

Electric heating

Metal heating

Cutting or disintegrating

219 69M, 219 69P, B23P 108

Patent

active

039885607

ABSTRACT:
In an EDM process, a method and apparatus are disclosed for determining the quality of a machining gap by detecting a voltage signal across the gap in response to a low power pulse applied immediately prior to a machining pulse. Upon detecting a first predetermined number of consecutive inferior gap voltage signals in response to corresponding low power pulses the application of low power pulses and machining pulses is terminated for a predetermined period of time. Thereafter, only the low power pulses are applied to the machining gap; and after detecting a second predetermined number of consecutive good gap voltage signals in response to corresponding low power pulses, the machining pulses are reapplied.

REFERENCES:
patent: 2979639 (1961-04-01), Williams et al.
patent: 3604885 (1971-09-01), Inoue
patent: 3755645 (1973-08-01), Kauffman
patent: 3816692 (1974-06-01), Ratmausky

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