Image forming apparatus, method of controlling image forming apparatus, and storage medium
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United States of America Patent
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Sep 20, 2016
Grant Date -
Aug 20, 2015
app pub date -
Feb 12, 2015
filing date -
Feb 17, 2014
priority date (Note) -
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Abstract
An image forming apparatus includes: a light source; a polygon mirror; a brushless motor rotating a rotary polygon mirror; a light receiver configured to receive the light beam reflected by the polygon mirror; and a controller configured to perform driving control; detect a value related to an induced voltage; and perform a phase switching process. In a start-up period, the controller performs a control switching process of performing switching from rotation speed control based on the induced voltage to rotation speed control based on the light receiving timing of the light beam in a specific range in which a length from a start timing of an interruption period of the power to a timing when the detected value reaches the reference value does not become shorter than a length of a reference-disabled period.
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