Control circuit for automatic electric arc-welder

Details Control circuit for automatic electric arc-welder Control circuit for automatic electric arc-welder

1974-11-13

1976-08-17

Truhe, J. V.

Electric heating

Metal heating

By arc

219131R, 318258, B23K 912

Patent

active

039756165

ABSTRACT:
An electrode feed motor control circuit for an automatic electric arc welder which gives improved starting. For cold starts, the electrode feed motor is instantaneously braked when the electrode first contacts the workpiece so that the electrode is lightly touching the workpiece and the electrode motor field is energized for pull back preparatory to the weld start. For hot and cold starts, the motor speed more rapidly responds to transitional meltoff requirements. The motor speed is automatically limited until the arc is fully established.

REFERENCES:
patent: 2468570 (1949-04-01), Nyburg
patent: 2752469 (1956-06-01), Price
patent: 2759120 (1956-08-01), Cornell, Jr.
patent: 2832000 (1958-04-01), Steele
patent: 3141085 (1964-07-01), Manz
patent: 3369146 (1968-02-01), Adamson
patent: 3611093 (1971-10-01), Walker
patent: 3684937 (1972-08-01), Reeves et al.

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