| 摘要 |
<p>An arc start control method is comprised of step 1 for starting advance of a welding wire, step 2 for determining that a distal end of a welding wire contacts a base material and short circuit is caused, step 3 for proceeding to step 4 if a feed torque value is a reference torque value or greater at the time of determination of short circuit, and proceeding to step 5 if the feed torque value is smaller than the reference torque value, step 4 for starting retracting the welding wire and separating the distal end of the welding wire from the base material without generating an arc and returning to step 1, step 5 for starting retracting the welding wire and separating the distal end of the welding wire from the base material and generating an initial arc between the welding wire and the base material, step 6 for continuing retracting the welding wire while maintaining the initial arc to elongate an arc length, and step 7 for stopping retracting the welding wire and starting advance of the welding wire to change a state of the arc from the initial arc to a steady arc.</p> |
