| 摘要 |
PROBLEM TO BE SOLVED: To obtain an excellent color image without image deviation by avoiding the decrease of a writing position accuracy in a subscanning direction even when a main scanning synchronizing signal is fluctuated resulting from the irregular rotation of a polygon motor and the machining accuracy of a polygon mirror in an image forming device provided with plural photoreceptors and optical writing parts and forming and transferring a color image by every color. SOLUTION: This image forming device provided with plural photoreceptors and optical writing pats and forming and transferring the color image by every color is provided with a DETP timing difference measuring part 305 outputting an image writing start timing signal for every optical writing means and an MPU 301 adjusting the image writing start timing signal, based on the output timing of each main scanning synchronizing signal after adjusting a phase by a motor phase control circuit 303. |
