| 摘要 |
PURPOSE:To enable control of a high speed motor by fixing an encoder to the motor and varying the timing of a drive signal following to the variation of motor speed and corresponding to the number of cycle of an encoder signal. CONSTITUTION:When a motor 30 rotates with low speed, a CPU33 starts operation every time when one cycle of an encoder 31 signal rises. Upon finish of operation of about 0.1msec, a drive signal DS is produced and the rotation of the motor 30 is controlled through a motor drive circuit 32. When the motor 30 rotates with high speed, the CPU33 starts operation for every two cycle rising of the encoder 31 signal and provides the drive signal DS to the motor drive circuit 32 upon finish of operation of about 0.1msec. By such arrangement, high speed rotation control of the motor 30 can be realized. |
