A method and apparatus for detecting non-axisymmetric wear (i.e. grooving 22) of the orifice (12) of the nozzle (13) of a plasma arc torch (1) involves placement of a probe adjacent a plasma jet (21) that emerges from the nozzle (13) such that a number of electrically isolated elements (23) of...http://www.google.es/patents/US5756960?utm_source=gb-gplus-sharePatente US5756960 - Detecting non-symmetrical nozzle wear in a plasma arc torch
Detecting non-symmetrical nozzle wear in a plasma arc torch
