| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a zero point setting-based welding control method capable of achieving greater machining precision, controlling wear, loosening and damage of a machine tool, and executing efficient implementation of zero point setting. Ž<P>SOLUTION: A welding method includes involves setting a plate-shaped workpiece W and a nut N on a positioning pin 8 projecting upward through a through-hole 5h of a lower electrode 5, pressing the nut N from above to set the zero point of the positioning pin 8, and determining abnormality of the position of the nut N and abnormality of the equipment in accordance with this zero point. In the method, after setting the workpiece on the lower electrode 5, a cycle is automatically performed, which comprises a sequence of lowering the upper electrode 5, compressing the workpiece (energization), and releasing the compression. The zero point can be automatically measured and set during this cycle when the position of the workpiece conforms with the standard position. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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