| 摘要 |
PURPOSE:To improve machining accuracy by previously contacting a plurality of electrodes with a pin adhered with no sludge and storing a difference between a distance on a drawing and a measured distance as a correcting amount. CONSTITUTION:When a start switch is turned ON, an electrode replacing device 8 mounts an electrode being held on an electrode holding device 7 onto a spindle 6, then a table 10 is moved in X and Y directions so as to measure the distance to a pin 4 thus obtaining a difference between the measured distance and a design distance. The difference is stored as a correcting amount into a controller 9. These operations are repeated for all electrodes being held on the electrode holding device 7, then machining power source is turned ON to start machining of a work. Here, the correcting amount stored in the controller 9 is called out every time when an electrode is replaced so as to correct the position of the spindle 1 with respect to the work.
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