| 摘要 |
A device is provided for chopping a control signal of an initial excitation phase or a final excitation phase by a predetermined cycle during low speed rotation control of an excitation phase control signal (excitation control signal) of a stepping motor when acceleration control and deceleration control of the stepping motor are effected, thereby reducing an excessively great driving current created during low speed rotation of the stepping motor, particularly the initial retaining excitation period during acceleration control and the final retaining excitation period during deceleration.
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