| 摘要 |
A method for adjusting a tension applied to a photoreceptor belt in a printing apparatus includes adjusting the tension applied to the photoreceptor belt according to at least three modes including a normal print mode where tension is applied to the photoreceptor belt for a printing operation by pressing the tension roller in a predetermined direction, a loosened tension mode where the tension to the photoreceptor belt is loosened by decreasing the pressure applied to the tension roller during the suspension of the printing operation, and a belt replace mode where the tension to the photoreceptor belt is released to replace the photoreceptor belt, by releasing pressure applied to the tension roller. The mode switching into each mode includes operating a driving motor which drives a tension adjusting unit, to adjust the tension of the photoreceptor belt; detecting the position of the tension adjusting unit; recognizing a mode corresponding to the position of the tension adjusting unit; and stopping the driving motor to stop the operation of the tension adjusting unit if the mode to be switched to is recognized. Therefore, during suspension of the printing operation, the mode can be switched into the loosened tension mode, so that the tension to the photoreceptor belt can be loosened without damage to the photoreceptor belt. As a result, a partial stiffening and folding of the photoreceptor belt at the bent portion thereof can be prevented.
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