| 摘要 |
A system and method for detecting the position of the welding torch with respect to the workpiece by varying the electrical power to the arc, measuring the effect of such variation on the arc current and/or arc voltage and processing the detected effect to produce welding torch position related information. Also, a welding system and method which comprises utilizing this detection system and method to control the position of the welding torch means with respect to the workpiece.
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