Torch height acquisition using arc transfer

Details Torch height acquisition using arc transfer Torch height acquisition using arc transfer

1980-07-09

1982-04-13

Reynolds, B. A.

Electric heating

Metal heating

By arc

219121PW, 219121P, 21912402, 2191304, B23K 906

Patent

active

043249710

ABSTRACT:
Initial torch height is acquired by moving a plasma torch toward a workpiece while operating in a pilot mode. The downward movement of the torch is halted when a current sensing relay coupled to the main arc supply senses the transference of the main arc.
In a preferred embodiment, the downward movement of the torch is continued until a fixed period of time has passed after the main arc ignition has been sensed.

REFERENCES:
patent: 1648563 (1927-11-01), Morton
patent: 1784015 (1930-12-01), Lane et al.
patent: 2929917 (1960-03-01), Kruml et al.
patent: 3711058 (1973-01-01), Weman
patent: 4017707 (1977-04-01), Brown et al.
patent: 4101754 (1978-07-01), Fischer
patent: 4170727 (1979-10-01), Wilkins
patent: 4203022 (1980-05-01), Couch, Jr. et al.

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