Servo feed system for electrical discharge machining apparatus

Details Servo feed system for electrical discharge machining apparatus Servo feed system for electrical discharge machining apparatus

1979-03-26

1982-03-16

Shaw, C. C.

Electric heating

Metal heating

Cutting or disintegrating

219 69C, B23P 102

Patent

active

043202780

ABSTRACT:
The servo circuit is operable to monitor gap conditions on any number of working leads up to four at the same time. It further has the capability of responding to high voltage operating conditions and then reducing the gap voltage being sensed to an appropriate level. An analog stage is then employed to pick out the most valuable information being provided from the several gap leads. An amplifier of the FET type is used to provide high input impedance to the circuit. An absolute value circuit is further included which in either polarity will rectify the gap signal back to the positive level.

REFERENCES:
patent: 3485992 (1969-12-01), Sennowitz
patent: 3558998 (1971-01-01), Bertolasi
patent: 3996445 (1976-12-01), Wohlabaugh

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