Epson 2070 Service Manual - Page 54
Operation Principles, LQ-2070 Servcie Manual, Push Tractor Method - lq parts
UPC - 010343812277
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Operation Principles LQ-2070 Servcie Manual 2. Push Tractor Method The push tractor method can be used with either the rear or front entrance. 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, the tractor gear rotates in the direction of the black arrow, and thus feeds paper into the printer. Paper is advanced by the platen and paper tension roller, which are also driven by the PF motor through the gear train. 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 gear train in the front part 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 paper into the printer. Paper is advanced by the paper drive roller and platen, which are also driven by the PF motor through the gear train. In the push tractor method, the release lever is set to one of the tractor positions to release the pressure between the paper guide roller and the platen. Figure 2-6 illustrates push tractor operation when paper is fed through the rear paper entrance. Figure 2-7 illustrates push tractor operation when the paper is fed through the front paper entrance. 2-6 Rev.A