| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device where image forming with excessive density and surface staining are surely reduced. SOLUTION: A CPU firstly executes developer stirring processing for 30 seconds (substep sb1-2) after starting the rotation of a photoreceptive drum (substep sb1-1). The triboelectrification of two-component developer is accelerated by the developer stirring processing, so that the surface staining at the non- image part of a photoreceptive drum is reduced. Next, the CPU refers to Vsg (substep sb1-3). Then, in the case that it is judged as Vsg<3.9 (yes at substep sb1-3), it is judged that the surface staining of a level exceeding a tolerance is caused on the photoreceptive drum, so that the sequence of control is looped with the substep sb1-2 so as to stir the two-component developer at the inside of a developing device more. Looping is executed until the CPU judged as Vsg>=3.9 by the substep sb1-3. |
