| 摘要 |
PURPOSE:To prevent oscillations which are unnecessary at the time of driving by differential compensation and to allow a DC motor smoothly by varying a command stepwise through a drive control circuit in response to the input of a stepping pulse. CONSTITUTION:The rotation-direction indication signal and stepping pulse train of a DC motor 1 are supplied from a hose device to the count controller 6 of the drive control circuit 4 of a stepping controller to detect the memontary cumulative difference between the stepping pulses and feedback pulses, and an up/down counter 7 is controlled according to the difference. The output of the counter 7 is converted by a D/A converter 8 into an analog signal, which is applied through a power amplifier 10 through a compensating circuit 9 to drive the motor 1 by the output of the amplifier 10. Further, a two-phase sine wave corresponding to the rotation of the motor 1 is applied from an optical encoder 2 to a rotation-direction discriminating circuit 5, which applies feedback pulses and a rotation-direction signal to the controller 6. Then, the command is varied stepwise with the stepping pulse to operate the motor 1 smoothly. |
