| 摘要 |
PROBLEM TO BE SOLVED: To reset the angle between the projecting pole of a platen and a magnetic pole of moving section and pitch to the normal value by moving a correcting bar in parallel to the reference axis in the direction of the reference axis to pull the moving section. SOLUTION: A linear actuator 5 is operated with a signal of a step-out detecting apparatus to move a correction bar 6 in the direction of the reference axis by while keeping this bar parallel to the Y axis. The moving part 2 is pressed toward the correction bar 5 to move and collides with a stopper 3 parallel to the reference axis y. Simultaneously, an X axis limit switch 7 operates to stop the linear actuator 5. The moving part 2 becomes parallel to the reference axis y and therefore the step-out condition in the X axis direction can be eliminated. In regard to the direction of Y axis, the pitch of any projected pole and magnetic pole is almost in the normal condition. Therefore, when the command to move toward the origin O on the reference axis y is given to the moving part 2 and the moving part 2 reaches the origin O, the limit switch 8 operates to stop the moving part 2. Since the moving part is moved up to the origin O as explained above, the normal condition can surely be reset. |
