| 摘要 |
PURPOSE:To reduce the cycle time by obtaining a difference between a set moving amount and an actual moving amount and feeding back it so as to correct the setting moving amount. CONSTITUTION:A main controller 1, a home position restoration correcting circuit 2A, a positioning circuit 3A and a speed control circuit 4A constitute a positioner, a position command of the main controller 1 drives a DC servo motor 5A so as to position the mobile body. In this case, when a home position restoring command V2 is outputted from the main controller to said correcting circuit 2A the restoring amount up to the home position is set to a latch 22. Further, a difference between a value Q1 of a setter 21 and a value Q2 of an up-down counter 17 (difference between the set moving mount and actual moving amount at a prescribed section) is operated by a differential amplifier 23 so as to obtain the shift. The difference between the former difference and a return amount Q4 of said latch 22 is operated by a differential amplifier 25 to correct the setting movement amount at the return. The corrected setting moving am ount is used as a hoe position restoring command via a data selector 24 and it is outputted to the positioning circuit 3. |
