Epson FX 1170 Service Manual - Page 53
Yii!ifx,pushTractorGear
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REV.-A (4) push-pull Tractor Method A, c : .' The push-pull tractor method is a combination of the push and pull tractor methods. Two tractors are used to advance the paper: one at the front paper entrance and the other at the rear paper entrance. They operate simultaneously to push and pull the paper through the printer mechanism. Figure 2-8 illustrates push-pull tractor operation when the paper is fed through the rear paper entrance. Figure 2-9 illustrates push-pull tractor operation when the paper is fed through the front entrance. Paper (Continuous) ?;:?=:: .. Pull Tractor ./\ 8 ,:::,,,,,, =. @ ,. / ~/ d ,/v' \ . '. / Push Tractor Yi !ifx,pushTractorGear i-. ~d Tractor Reduction Gear 1 PF Motor Pinion Gear / Pul / Paper Advance Reduction Gear klotor, PF Figure 2-8. Push-Pull Tractor Operation Using the Rear Paper Entrance 2-1o