Plasma arc torch position control

Details Plasma arc torch position control Plasma arc torch position control

1997-07-25

1999-02-02

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912157, 21912154, 21913031, B23K 1000

Patent

active

058668721

ABSTRACT:
A plasma arc torch system includes a plasma arc torch and a positioning apparatus for automated processing of workpieces. In order to maintain consistent cut quality, a controller maintains arc voltage at a predetermined reference value by controlling a standoff between the torch and the workpiece. To prevent contact between the torch and workpiece during kerf crossings and to maintain an optimum standoff during acceleration and deceleration, standoff control override algorithms are implemented in the controller. Additionally, a contact sensing apparatus is provided to automatically retract the torch in the event of contact with the workpiece during processing.

REFERENCES:
patent: 5521350 (1996-05-01), Nishi et al.

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