| 摘要 |
PURPOSE:To enable to use both a continuous form slip paper provided with feed holes and a sheet form paper not provided with feed holes, by a method wherein a pin sprocket driven in response to a paper-feeding operation is provided with a rotary encoder, and paper feed quantity is corrected by utilizing a detection signal generated by the encoder. CONSTITUTION:A recording paper 8 provided with the feed holes is fitted around the pin sprocket 2 (driven) for detection, and is fed by a platen 1 (driven by a step motor 7 through a train of wheels 5, 6) and a press roller (not shown). The pin sprocket 2 is attached with the rotary encoder comprised of a light detector 4 and a detecting disk 3 (numeral 31 denotes a slit), and signals P0, P1, P2,... comprising one pulse per revolution of the slit 2 are generated. Then, the number of feeding steps of the step motor 7 is counted in the section (a) between the signals P0 and P1 (section 0), the error E0 of the counted number from an ideal step number (m) is calculated, and the feed quantity for the subsequent section 1 (b) is corrected on the basis of the error E0. |
