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1. (WO2017062676) CONTROLLING PLASMA ARC TORCHES AND RELATED SYSTEMS AND METHODS

Pub. No.:    WO/2017/062676    International Application No.:    PCT/US2016/055833
Publication Date: Fri Apr 14 01:59:59 CEST 2017 International Filing Date: Fri Oct 07 01:59:59 CEST 2016
IPC: H05H 1/34
H05H 1/36
Applicants: HYPERTHERM, INC.
Inventors: MITRA, Soumya
LIEBOLD, Stephen, M.
AMES, Jonathan
PASSAGE, Christopher, S.
PETERS, John
DUNBAR, Steve
Title: CONTROLLING PLASMA ARC TORCHES AND RELATED SYSTEMS AND METHODS
Abstract:
In some aspects, methods for preserving a usable life of a plasma arc electrode consumable installed in a plasma arc torch can include measuring a characteristic of an electrical signal being provided to the torch to generate a plasma arc between the torch and a workpiece to be processed; monitoring the characteristic during operation of the torch over a time period; comparing the characteristic to a threshold value; and responsive to determining that a measured characteristic meets and/or exceeds the threshold value, initiating an arc extinguishing sequence to preserve the life of the electrode.