| 摘要 |
PROBLEM TO BE SOLVED: To provide an arc welding equipment that can ensure successful operation of equipment by facilitating detection of short-circuit failure. SOLUTION: Before applying arc welding treatment, a base material 5 or a tool 7 is brought into contact with a welding wire 17, with an electric current flowing in a welding circuit 25 measured. This measured current IK is compared with a reference current I0 for discrimination which is predetermined corresponding to the welding circuit 25, thereby discriminating the presence/absence of a short-circuit between the welding circuit 25 and a tool control circuit 12. If occurrence of a short-circuit failure is discriminated, the process is prevented from shifting to the arc welding treatment. Accordingly, burning of control equipment or electric wire that may occur when arc welding treatment is carried out without knowing the occurrence of the short-circuit failure can be surely avoided. COPYRIGHT: (C)2008,JPO&INPIT
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