Belt driving controller, process cartridge, and image forming apparatus
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United States of America Patent
Stats
-
Sep 19, 2006
Grant Date -
Apr 21, 2005
app pub date -
Aug 27, 2004
filing date -
Aug 29, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A belt driving controller includes a driving roller having a radius r1, a plurality of driven rollers that is driven by rotation of the driving roller, the driven rollers having a radius r2, an endless belt that is wound on the driving roller and the driven rollers and an encoder that is attached to one of the driven rollers, and that outputs a signal. The rotation of the driving roller is controlled based on the signal from the encoder, and (.alpha.2/.alpha.1).times.(r1/r2).ltoreq.1 is satisfied where .alpha.1 is a correction coefficient for a fluctuation in thickness of the endless belt caused by a belt winding angle on the driving roller, and .alpha.2 is a correction coefficient for a fluctuation in the thickness on the driven roller.
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