| 摘要 |
A stepping motor controller for controlling a stepping motor, includes: a motor driver; and a driver control unit. The motor driver includes: an excitation phase control unit; and a drive unit. The driver control unit includes: a motor driver power control unit; a drive control unit; a clock signal output unit; and an excitation phase storing unit. The excitation phase storing unit acquires an excitation phase at a time when the motor driver power control unit stops supplying electricity to the motor driver, and stores the acquired excitation phase as a suspension excitation phase. When the motor driver power control unit resumes supplying electricity to the motor driver, the drive control unit instructs the drive unit to continue to halt the supply of the drive current until the excitation phase signal is updated, in response to each pulse of the clock signal, to an excitation phase signal specifying the suspension excitation phase, and instructs the drive unit to supply the drive current after the excitation phase signal is updated to reach the excitation phase signal specifying the suspension excitation phase.
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