| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a belt controller capable of suppressing the positional deviation of a toner image by quickly correcting the meandering of the belt even in the case the meandering of the belt in a traveling position exceeds a certain extent. <P>SOLUTION: In the image forming apparatus provided with an endless belt member stretched between a plurality of rollers, a means for detecting the traveling position in a belt width direction and a belt meandering correcting means, the control is switched so that the traveling position of the belt is sampled at previously set detection intervals, and the meandering is corrected for every sampling based on the positional deviation between the traveling position of the belt and the traveling target position, and so that the position of the belt is sampled at the detection intervals several times and the average value is calculated after the positional deviation is converged within a normal extent, and then, the meandering of the belt is corrected based on the deviation between the average value and the traveling target position of the belt. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
