| 摘要 |
PURPOSE:To prevent the vibration after positioning by completely interrupting a control input during the period less than positive and negative pulses including zero at the output of an error counter. CONSTITUTION:An error counter 2 compares an input pulse to be positioned as a target with a shaft rotating input pulse. When both inputs are equal, a detector 8 is started, an FF circuit 10 is set, and a power switch circuit 11 is opened. A control circuit of a motor 5 is interrupted due to the opening of the switch circuit 11, and a motor shaft is stopped. In this case, a detector 9 does not operate unless the pulse from a sensor 7 side due to overrun is less than two. Accordingly, inputs from controllers 3, 4 are interrupted as long as the output of the counter 2 is two pulses including zero. |
