Patent ID: 7271365

Claim:
A pulse welding system for welding a workpiece in a pulse welding process, said pulse welding system comprising: a wire feeder adapted to direct a welding electrode toward a workpiece; a power source having an output terminal coupled with said welding electrode and a control input terminal, said power source providing a welding signal at said output terminal according to a control input signal at said control input terminal in a succession of welding cycles, each said welding cycle including a melting condition during which said welding signal heats an end of said welding electrode to form molten metal at said end and a transfer condition in which said molten metal is separated from said end of said welding electrode before said molten metal contacts said workpiece; and a controller coupled to said control input terminal of said power source, said controller comprising an energy measurement system for determining the energy applied to said welding electrode in each said welding cycle, said controller providing said control input signal such that a pulse is provided in said welding signal to initiate said transfer condition of each said welding cycle when the energy applied to said welding electrode in said welding cycle reaches a predetermined energy value.