| 摘要 |
PROBLEM TO BE SOLVED: To provide a positioning apparatus in which the positioning accuracy of a machine origin is high. SOLUTION: A back-and-forth movement mechanism (E, P1, P2) has structure capable of displacing its position when external force is applied to a mobile object while driving force is not applied from a servo motor M. A control command generation device 2 continuously generates torque necessary for holding the back-and-forth movement mechanism on a machine origin from the servo motor M even after the torque of the servo motor M reached a set value L1 and an electric origin signal is output. In the state, the machine origin is set and stored on the basis of an output from an absolute encoder AE. COPYRIGHT: (C)2006,JPO&NCIPI
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