Patent ID: 8723081

Claim:
A welding output control method for arc welding using a consumable electrode, the method comprising: feeding the consumable electrode to a welding workpiece; and supplying power between the consumable electrode and the welding workpiece by a welding power supply unit so as to alternate between a short-circuiting period during which a short-circuit takes place between the consumable electrode and the welding workpiece and an arcing period during which an electric arc is formed between the consumable electrode and the welding workpiece; wherein a commanded voltage is supplied between the consumable electrode and the workpiece during each arcing period so that the commanded voltage continuously decreases over time, from a first short-circuiting period before the arcing period to a second short-circuiting period after the arcing period, and a predetermined superimposed voltage waveform is superimposed on the commanded voltage waveform during a predetermined period within the arcing period, the superimposed voltage waveform being shorter than a short-circuit cycle and longer than a control cycle of the welding power supply unit.