| 摘要 |
<p>PURPOSE:To easily obtain a plurality of transportation density with low noise by carrying-out transportation in the combination of a plurality of transportation amounts. CONSTITUTION:In order to obtain a scan density of 6.16 pieces/mm., a controller 31 inputs alternately 2-3 driving pulses in 0.5 step into a driving circuit 32 each time synchronous signals are input. Said driving circuit 32 advances a step motor 33 by 1 step and 1.5 steps alternately, and the scanning lines 21-28 having 1.25 step pitches as average are obtained. In this case, the density of scanning lines driven in one step is 7.7 pieces/mm.. Though the error in + or -0.25 step is generated in one scanning in this method, this error corresponds to a length of 0.03mm. or so, and the desirable image quality free from the trouble in feeling can be obtained.</p> |
