Epson 680Pro Service Manual - Page 34
Paper Feeding Mechanism
UPC - 010343832138
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EPSON Stylus COLOR 680/777/77i 2.1.4 Paper Feeding Mechanism The paper feeding mechanism consists of Paper feed motor (PF motor), PF roller, Paper eject roller, Star wheel roller, and so on. The paper feeding mechanism feeds paper loaded from ASF using the PF roller and Paper Eject Roller & Star wheel roller. For this mechanism, the PF motor mentioned in the right Table 2-2 is used on this product. The drive of the PF motor is transfer to the PF roller and the Paper Eject Roller as following Figure 2-6. Following shows you how to transfer the PF motor drive to the PF roller and the Paper Eject Roller. o PF motor drive transmission path PF Motor Pinion Gear (CW) → Combination Gear 16, 21.6 (CCW) → Spur Gear 73.6 (CW) → Spur Gear 15 (CCW) → Combination Gear 37.6, 44.4 (W) → Spur Gear 23.2 (CCW) → Spur gear 35.2(CW) Revision B Item Motor type Drive voltage Coil Resistance Inductance Driving method Driver IC Table 2-2. PF Motor Specifications Description 4-Phase/ 200-Pole HB Stepping motor +42 V +/ - 5% (DRV IC voltage) 7.8 Ω +/ - 10% (per phase) 13.5 mH +/ - 20%(1kH 1Vrms) Bi-Polar drive LB11847 PF roller Spur Gear 15 Spur Gear 35.2 Spur Gear 23.2 Combination gear 37.6, 44.4 Figure 2-6. Paper Feeding Mechanism Paper loaded from ASF is advanced by the following roller. o Paper feed roller & Paper guide roller (assembled on the Top Frame) → Paper eject roller & Star wheel roller (assembled on the Paper eject frame). Additionally, the top & end of the paper is detected with the HP/PE sensor. In case the PE sensor dose not detect the paper in the paper loading sequence, the printer detects the "Paper out error". If the paper is detected after complete the paper eject sequence, the printer detects the "Paper jam error". Operating Principles Overview 34