Thermal torch height acquisition circuit

Details Thermal torch height acquisition circuit Thermal torch height acquisition circuit

H - Electricity

05

H

327/72

H05H 1/32 (2006.01) B23K 9/073 (2006.01) B23K 10/00 (2006.01)

Patent

CA 1121466

Abstract A plasma torch circuit including a control for initially setting -the torch at a desired height above a workpiece (26) during the time the non-transferred arc (22) exists between the torch cathode (10) and the torch tip (20). Measurement is made of the voltage between the cathode (10) and the workpiece (26), and that voltage is compared to an input for controlling torch height. During transferred are operation, a reference is initially created by storing the cathode-to-workpiece voltage occurring immediately after the transferred arc is turned on, and using the latter stored voltage as a reference for torch height maintenance.

320747

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