| 摘要 |
PROBLEM TO BE SOLVED: To realize the speed control for an actuator of low cost structure. SOLUTION: A potentiometer, interlocked with a displacement of an actuator, is provided. A speed of the actuator is detected by the change of a voltage of the potentiometer and a motor current is detected, and if the speed of the actuator is lowered from a target speed and to be increased, the incrementing value of a drive control output value is increased according to a load detected by the motor current. With such a constitution, the constant speed control can be realized by using a potentiometer, which is relatively cheaper than a rotary sensor, and further, even if the actuator speed is shifted to the lower side of the target speed in a high load state, the drive control output value is increased according to the detected current value; so that the actuator speed shifted to the lower side of the target speed can approach the target speed quickly, and hence the deterioration of the stability of the constant speed control can be avoided.
|
