Epson FX 1170 Service Manual - Page 50
Push Tractor Operation Using the Rear Paper Entrance, A Tractor Reduction G
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(2) push Tractor Method REV.-A When the push tractor method is used with the rear entrance, the torque generated by the PF motor is transmitted to the push tractor gear through the PF motor pinion gear, paper advance reduction gear, and tractor reduction gear. When the PF motor pinion gear turns in the direction of the black arrow, thetractorgear rotates in the direction of the black arrow and thus feeds the paper into the printer. The paper is advanced by the platen and the paper tension roller, which are also driven by the PF motor through the train of gears. When the push tractor method is used with the front entrance, the torque generated by the PF motor is transmitted to the push tractor gear through the PF motor pinion gear, paper advance reduction gear, platen gear, and the train of gears in the front pan of the printer. When the PF motor pinion gear turns in the direction of the black arrow, the tractor gear rotates in the direction of the black arrow and thus feeds the paper into the printer. The paper is advanced by the paper drive roller and the platen, which are also driven by the PF motor through the train of gears. In the push tractor method, the release lever issetto one ofthetractor positions to release the pressure between the paper advance roller and the platen, Figure 2-5 illustrates push tractor operation when the paper is fed through the rear paper entrance. Figure 2-6 illustrates push tractor operation when the paper is fed through the front paper entrance. Paper (Continuous) \ '7perTensi0nR0"er \Lu- . Push Tractor . \\b./ \ \ ~> Tractor Gear ~/A Tractor Reduction G ear Paper Ten ~(~~~ ,pFMotor P i n i o n Gear / 'w' $aper Advance Motor, PF Reduction Gear Figure 2-5. Push Tractor Operation Using the Rear Paper Entrance 2-7