| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce a vibration amount of a stepping motor with a simple structure. <P>SOLUTION: The drive controller for controlling a driving signal for magnetizing a plurality of windings of stepping motors 107 and 108 includes a microprocessor 111 for obtaining a detection result of an exciting current flowing into the plurality of windings, and feedback-controlling drive circuits 119 and 120 so that a difference between a first time difference Ta from first reference time T01 which is set in an exciting current waveform of the winding corresponding to a phase A to time when a setting current value Ith is given and a second time difference Tb from second reference time T02 corresponding to the first reference time, which is set in an exciting current waveform of the winding corresponding to a phase B, to time when the setting current value Ith is given is decreased. <P>COPYRIGHT: (C)2013,JPO&INPIT |
