| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce erroneous determination of whether a stepping motor is rotating or stopping.SOLUTION: The stepping motor drive device stops application of a voltage to a stepping motor 30 at a lapse of a predetermined time after a voltage applied to a stepping motor 30 reaches a predetermined value. During a stopping period, a counterelectromotive voltage of the stepping motor is measured, and from a value of the counterelectromotive voltage, rotation/stopping of the stepping motor is grasped.</p> |
