ORIGIN POINT LOCATING METHOD FOR NC MACHINE

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for setting the origin of a numerically controlled machine tool. In the related art, when a dog switch is turned on and off and decelerates from the speed 2 and stops at the moment of reaching zero point A, a Z phase pulse is generated at about the same time. If so, it may be detected at the current point due to the delay problem of the Z-phase detection circuit, or may be detected at the next Z-phase pulse (that is, after one pitch). Therefore, the present invention does not decelerate stop immediately even when the dog switch is set from 'on' state to 'off' state by decelerating stop immediately after feeding by the set parameter amount and then decelerating to stop and then go to Z phase pulse. Avoid originating the stop and Z phase pulses at the same time so that the home position is always at a fixed position.