Apparatus for controlling tool feed mechanism on an EDM machine

Details Apparatus for controlling tool feed mechanism on an EDM machine Apparatus for controlling tool feed mechanism on an EDM machine

1975-12-29

1977-05-03

Reynolds, Bruce A.

Electric heating

Metal heating

Cutting or disintegrating

219 69C, 219 69P, 23515111, B23P 108

Patent

active

040216357

ABSTRACT:
An apparatus is disclosed for use with an EDM machine for controlling the motion of the tool relative to a workpiece. In one embodiment, during the ON time, low power pulses are applied across the machining gap immediately prior to machining pulses. A gap voltage signal produced in response to the low power pulses is used exclusively as an input to control the tool feed mechanism. In another embodiment, the gap voltage signal produced by a low power pulse is combined with a gap current signal produced by a machining pulse to generate control signals which are used to produce command signals for the tool feed mechanism. Further, these control signals may be used to drive a meter which provides a visual indication of the general condition of the machining gap.

REFERENCES:
patent: 2979639 (1961-04-01), Williams et al.
patent: 3604885 (1971-09-01), Inoue
patent: 3694599 (1972-09-01), Davis
patent: 3705286 (1972-12-01), Koudo et al.

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