| 摘要 |
PURPOSE:To invariably drive a driven body in response to an action quantity by controlling the pulse width of the drive signal to a DC motor based on the signal on the rotation angle so that the driven body is driven by the same distance for the unit action of a drive indicator. CONSTITUTION:When a drive indicator 17 is operated to indicate the shift of a stage 7, a gate circuit 11 is opened while pulses are fed from the indicator 17, and pulse signals from an oscillator 10 are fed to a drive pulse generating circuit 12. Signals indicating the rotation of a DC motor 14 from a rotary encoder 15 are fed to a pulse width control signal generating circuit 16. The circuit 16 counts the signals from the encoder 15 to form a signal indicating the rotation angle from the reference of a lever body. The circuit 16 specifies the address based on the signal, the pulse specified signal on the angle is read out, the width of the drive pulse generated by the circuit 12 is controlled, drive pulses with a different width are fed to the motor 14, and the stage 7 is moved by the quantity corresponding to the action quantity of the indicator 17. |
