| 摘要 |
PURPOSE:To notably increase the precision of stopping position regardless of the number of strokes, by controlling the drive motor so that sliding may stop within the range between the maximum dispersion angle and minimum dispersion angle. CONSTITUTION:A rotation detector 1 detects the rotation of drive motor, and generates a voltage proportional to the press stroke of a press, and inputs it into an operational amplifier 2. When the input voltage of the operational amplifier 2 becomes higher than the reference voltage, a negative voltage corresponding to this potential difference is output to the output of an operational amplifier 10, so that the negative voltage inclination of the input voltage of an operational amplifier 8 for comparison is promoted. When the input voltage of the operational amplifier 2 becomes lower than the reference voltage, on the other hand, a negative voltage corresponding to this potential difference is outputted to the output of the operational amplifier, so that the negative voltage inclination of the input voltage of the operational amplifier 8 is promoted. Such degree of promotion is designed to be proportional to the potential difference between the input voltage of the operational amplifier 2 and the reference voltage. |
