| 摘要 |
PURPOSE:To prevent a shift of an image, and to record a distinct image by providing a common frequency signal generating means for supplying a common reference frequency signal to plural PLL control means. CONSTITUTION:A reference frequency signal generated from a reference signal oscillator 73 consisting of a crystal oscillator, etc. is supplied to each PLL control part 81 of a scanner control part 75, a photosensitive drum control part 76, a fixing roller control part 77, and a belt control part 78, through a frequency divider 74. Each PLL control part compares signals which are divided into frequencies corresponding to each driving speed of a scanner, a photosensitive drum, a carrying belt, and a fixing roller from a common reference frequency signal, and frequency signals which are fed back from encoders 57, 63, 67 and 72, and executes a rotational control. In such a way, a variance of the reference frequency for driving each member is prevented and a shift of an image is eliminated, and a distinct image can be recorded. |
