| 摘要 |
PURPOSE:To easily and accurately provide an origin without necessity of any regulation by rotating reversely a stepping motor by driving pulses of the number required for one revolution, and forcibly bringing a load in contact with a stopper. CONSTITUTION:A stepping motor 3 is rotated reversely of an arrow (b) through a driver 9 by driving pulses output from a controller 8. In this case, the driving pulses of the number required for rotating the motor 3 one revolution are output from the controller 8. A damper 1 is always forcibly stopped in contact with a stopper 6 before all the driving pulses are applied. The motor 3 is stepped out due to the out of synchronization while the remaining pulses are supplied from the stopping state, but when the supply of the pulses is finished, it is stopped in contact with the stopper 6 in a steady state. |
