Arc welding control method and arc welding device

A method comprising:

• operating an arc welding device to perform arc welding by alternately repeating a short-circuit period and an arc period as a main component while feeding a welding wire to a base material at a constant wire feeding speed using a shield gas containing carbon dioxide,
• wherein the operating of the arc welding device includes:
• automatically starting, by a controller of the arc welding device, at least one arc period by increasing a welding current in the short-circuit period based on a welding voltage detected by a voltage detector of the arc welding device and a welding current detected by a current detector of the arc welding device;
• and
• in the at least one arc period:
• automatically increasing, by the controller of the arc welding device, the welding current to a first current value at a first gradient and automatically maintaining the welding current at the first current value for a first period;
• automatically reducing, by the controller of the arc welding device, the welding current from the first current value to a second current value at a second gradient and automatically maintaining the welding current at the second current value for a second period;
• automatically increasing, by the controller of the arc welding device, the welding current from the second current value to a third current value at a third gradient;
• and
• automatically starting to reduce, by the controller of the arc welding device, the welding current from the third current value within a third period, which is shorter than the first period, after the welding current reaches the third current value.