| 摘要 |
PURPOSE:To obtain a servo circuit which is free from the control for each motor and can perform the accurate driving control by storing a digital signal to produce the bias voltage with which a servomotor driven digitally reaches the prescribed revolving speed. CONSTITUTION:A digital circuit 24 is triggered when a start switch 23 is turned on, and the minimum digital signal is delivered to a memory circuit 25. This digital signal is converted into an analog signal by a D/A converter 26 and supplied to a power amplifier 27. The analog signal is amplified up to a level of electric power to given the initial drive to a servomotor 1. Thus the motor 1 is driven. A memory instruction is delivered from a comparator 22 by the detection signal sent from a revolving speed detector 21 when the signal value of the circuit 24 is gradually increased and the motor 1 reaches its prescribed revolving speed. The digital signal delivered from the circuit 24 is stored in the circuit 25. Hereafter the motor 1 is driven in accordance with the stored digital signal. |
