| 摘要 |
PROBLEM TO BE SOLVED: To stabilize longitudinal magnification by adjusting the revolving speeds of an optical system driving motor and a paper carrying motor controlled based on reference frequencies of respective oscillators at the time of forming an image. SOLUTION: At the time of forming the image, a CPU 2 detects the revolving speed of a main motor 5 by using an FG signal outputted from the rotated main motor 5. It reads out the reference value of the revolving speed of the main motor 5 previously stored in a nonvolatile memory 9, compares the detected revolving speed with the revolving speed of the reference value read out, and controls the revolving speed of a scanning motor 8 by using the adjusted value of the scanning motor 8 stored in the memory 9 in accordance with the compared result. |
