| 主权项 |
1. An arc welding system, comprising:
a welding power supply having a first output which is electrically coupled to a welding electrode and a second output which is electrically coupled to a switching mechanism, and where said welding power supply provides a welding current through either of said first and second outputs to weld at least one work piece with said welding electrode, a magnetic field sensor which senses a magnetic field near said welding electrode during welding, and wherein said switching mechanism has at least a first and second switch position, where said first switch position is coupled to a first position on said at least one work piece and said second switch position is coupled to a second position on said at least one work piece, which is remote from said first position, wherein during welding said switching mechanism switches between said first and second switch positions to change a current path for said welding current through said at least one work piece based on said detected magnetic field, wherein said welding current is a pulse welding current comprising a plurality of current pulse portions and said switching mechanism switches between said first and second switch positions between said current pulse portions. |
