Programmable current control system for wire electrode electrica

Details Programmable current control system for wire electrode electrica Programmable current control system for wire electrode electrica

1975-06-04

1978-03-07

Reynolds, Bruce A.

Electric heating

Metal heating

Cutting or disintegrating

219 69W, 364474, B23P 108

Patent

active

040781631

ABSTRACT:
The system includes data input means for information relative to the material of the workpiece and the thickness of the workpiece. A read-only memory then provides information to a programmable counter so that off-time for the machining power pulses is appropriately provided for. In addition, there is manual preset means for setting the off-time to be provided during gap short circuit condition. An appropriate cut-off sensing circuit is operatively connected to the gap for sensing short circuit condition and initiating the pulse reduction but only for the duration of the gap short circuit condition.

REFERENCES:
patent: 3614368 (1971-10-01), Lobur
patent: 3632942 (1972-01-01), Kondo
patent: 3697879 (1972-10-01), Holliday
patent: 3731045 (1973-05-01), Ullmann et al.
patent: 3790910 (1974-02-01), McCormack
patent: 3809847 (1974-05-01), Bell
patent: 3809848 (1974-05-01), Bell
patent: 3855443 (1974-12-01), Bell et al.
Nosov & Byron, Working Metals by Electro-Sparking, 1956, pp. 10, 11.

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