Stepping motor driving apparatus, image carrier rotation driving apparatus and image forming apparatus
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United States of America Patent
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Apr 11, 2017
Issued Date -
N/A
app pub date -
Mar 13, 2015
filing date -
Mar 28, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A stepping motor driving apparatus includes a stepping motor having a rotor, a driving unit configured to drive the stepping motor, and a rotation position detection unit configured to detect a rotation angle of the rotor. A control unit calculates a magnetic pole position of the stepping motor based on a first detection result and a second detection result. The stepping motor rotates by a predetermined step in one rotation direction from an initial position and thereafter rotates by the predetermined step in the other rotation direction so that the stepping motor is in a first held state. The first detection result is detected in the first held state. The stepping motor rotates by the predetermined step in the other rotation direction from the initial position and thereafter rotates by the predetermined step in the one rotation direction so that the stepping motor is in a second held state.
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