| 摘要 |
PROBLEM TO BE SOLVED: To restrain the vibration component below 100 Hz imparting an influence to an image, and to obtain the high torque and the stable rotation without making a motor large size as practicable, by structure rotary driving a photoreceptor by directly connecting the stepping motor with the photoreceptor. SOLUTION: As for this image forming device capable of forming the toner image being formed on a peripheral surface of the photoreceptor on transfer material in transferring directly driven by the stepping motor, the relation between a stepping angle θ( deg.) of the above stepping motor and rotary speed N (rpm) is shown by the next formula. θ<=(360.N)/(60.a.b), provided that, (a) stands for a natural number so that when the higher harmonic component of the rotary fluctuation caused by the step cycle of the stepping motor 1/a degree firstly becomes below the specific allowance value. |
