| 摘要 |
PURPOSE:To precisely set the carrying speed of a paper by controlling a driving speed by a set timer until two steps before a final speed and precisely controlling it after the leading edge part of the paper is detected by a sensor. CONSTITUTION:When a stepping motor 18 is started to be rotated, the paper is started to be fed by driving a resist roller 2. On a driving signal at this time, the frequency of a P1 pulse is impressed during (t1) hours and the frequency of a P2 pulse is impressed during the next (t2) hours. Then, the control timing thereof is controlled by using the timer of normal software. Besides, the timing when the speed of last one step is accelerated is controlled according to the time Ts that the driving is continuously executed by a P3 pulse by calculating the time that a frequency P3 is raised to P based on the detection time T0 of the paper from the sensor S provided on a downstream side from the roller 2. Thus, the timing that the paper is sent toward an image transfer part is precisely set. |
