Patent ID: 6987243
Filing Date: 2006-01-17
Classification: B23K

Abstract:
1. An apparatus for welding by depositing drops of molten metal at the end of a consumable welding wire into a weld puddle by short circuit transfer welding, comprising: a power source having a first waveform during a short condition and a second waveform during an arc condition as an output, wherein the output is in electrical communication with the welding wire; a feedback circuit, for providing a signal indicative of the output being in the short or the arc condition and further having as an output a real-time signal indicative of the heat input to each drop; a controller, coupled to the feedback circuit, and having a control output provided to the power source, wherein the control output commands the first waveform to have a desired and controlled current waveform and the second waveform to have a desired and controlled voltage waveform.