Patent ID: 7929894

Claim:
A driving control device for use in an image forming apparatus that includes a plurality of image carriers on which toner images are formed, respectively, and a transfer unit that includes an endless belt member and a plurality of rotating units that support the endless belt member, where at least one of the plurality of rotating units is a driving rotating unit configured to rotate to move the endless belt member endlessly so that the toner images on the image carriers are transferred onto a surface of the endless belt member or a recording medium that is held on the surface, the driving control device comprising: a control unit configured to analyze any one of a speed variation pattern and a thickness variation pattern of the endless belt member per at least one rotation of the endless belt member while endlessly moving the endless belt member, and configured to start to execute, based on a result of the analysis, a driving-speed-control-pattern updating process to update a driving speed control pattern of the driving rotating unit per at least one rotation of the endless belt member, after a power of the image forming apparatus is turned on and within a preparation period in which a preparation process is completed so that an image forming operation can be started based on an image formation command from an operator.