COLOR IMAGE-FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a control method whereby a positional deviation in a vertical scanning direction can be reduced by reducing an asynchronous rotational speed change generated by an asynchronous reference clock to each motor. SOLUTION: There are provided a photoreceptor-driving reference clock generation means, a polygon-driving reference clock generation means and a transfer driving reference clock generation means. The photoreceptor-driving reference clock generation means generates each of reference clocks based on one or a plurality of reference clocks generated by the polygon-driving reference clock generation means. The transfer driving reference clock generation means generates a reference clock based on any one of the plurality of reference clocks generated by the polygon-driving reference clock generation means or the photoreceptor-driving reference clock generation means.