| 摘要 |
PURPOSE:To perform accurate positioning and simplify a system by switching to the position signal generated by an encoder simultaneously to the completion of acceleration/deceleration drive and making a stop at a target position. CONSTITUTION:When acceleration/deceleration control is completed beyond the target stop position, control based upon an approximate sine-wave position signal A' is entered and the signal A' is at a positive voltage, so the signal is inverted by an error amplifier 13 to apply a motor 12 with a reverse voltage for return to the target stop position. The positive voltage is applied beyond a zero- cross point to start the driving for return to the zero-cross point. If the object is before the target stop position when the acceleration/deceleration control is completed, the signal A' is at a negative voltage, so the positive voltage is applied to make an advance to the target position, and oscillation operation is repeated thereafter to make a stop at the target stop position. |
