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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)
Table 2-2. PF Motor Specifications
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”.
Item Description
Motor type 4-Phase/ 200-Pole HB Stepping motor
Drive voltage +42 V +/ - 5% (DRV IC voltage)
Coil Resistance 7.8 Ω +/ - 10% (per phase)
Inductance 13.5 mH +/ - 20%(1kH 1Vrms)
Driving method Bi-Polar drive
Driver IC LB11847
PF roller
Spur Gear 15
Spur Gear 35.2
Spur Gear 23.2
Combination gear
37.6, 44.4
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