Image forming apparatus with endless belt and method for calculating meandering amount of belt
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United States of America Patent
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Sep 1, 2015
Grant Date -
Jun 5, 2014
app pub date -
Nov 26, 2013
filing date -
Nov 30, 2012
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Abstract
An image forming apparatus includes a control unit which controls a correcting operation of correcting the meandering of an endless belt by a roller position adjusting mechanism. Prior to the correcting operation, the control unit causes a toner image for monitoring to be transferred to an area of a circumferential surface of the belt passing a detection area of a density sensor, causes the density sensor to perform a first detecting operation of detecting the toner image for monitoring, subsequently causes the density sensor to perform a second detecting operation of detecting the toner image for monitoring after the circumferential surface of the belt is moved by a predetermined distance, and calculates a meandering amount of the belt by comparing a first density value obtained by the first detecting operation and a second density value obtained by the second detecting operation.
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