| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device forming a correct image by controlling the rotation driving of a photoreceptor drum or the recording timing of a recording head in response to the decentering of the photoreceptor drum. SOLUTION: An image forming unit 30 is constituted by integrally assembling a developing unit 30-1 and a drum unit 30-2 with a unit frame 30-3 and fixed by being attached to the unit receiving parts 33a and 33b of a main device body 1. A mark member 36 having a fan-shaped bar code is stuck to the prescribed position of a flange 345 forming the end surface of the photoreceptor drum 9. Then, the information of the bar code is detected by a sensor 41 disposed at the receiving part 33b through a detection hole 37 formed at a measurement reference position. A constant for driving the motor 58 of the drum 9 is included in the information of the bar code. By controlling a motor driving circuit 54' based on the information, the rotation driving of the respective drums 9 is controlled every drum by a CPU 51 so as to compensate the eccentric characteristic thereof. |
