Paper Feeding Mechanism - Epson STYLUS COLOR 580 Service Manual

EPSON Stylus COLOR 580

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 2-7. 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) Æ Combination Gear 8.4, 21.6 (CCW) Æ
Combination Gear 9.6, 33.6(CW) Æ Spur Gear 15 (PF roller)(CCW) Æ Spur Gear
34.2 (CW) Æ Spur gear 15 (CCW)
Top view
HP/PE/IC Sensor
Paper Feed Roller Paper Eject Roller
Paper loaded from ASF is advanced by the following roller.
o
Paper feed roller & Paper guide roller (assembled on the Top Frame)
eject roller & Star wheel roller (assembled on the Paper eject frame).
Operating Principles
Right side view
PF Motor
Paper Guide
Star Wheel
Spur Gear 15
(PF Roller)
Combination
Gear 12.6, 18.4
Spur Gear 34.2
Spur Gear 15
Spur Gear 15.2
Figure 2-7. Paper Feeding Mechanism
Item
Motor type
Drive voltage
Coil Resistance
Inductance
Driving method
Driver IC
Roller
Change
Lever
Combination Gear 11.2, 32.4
Combination Gear 8.4, 21.6
Combination Gear 9.6,33.6
Additionally, the top & end of the paper is detected with the HP/PE/IC sensor.
In case the PE sensor dose not detect the paper in the paper loading sequence, the
Paper
printer detects the "Paper out error". If the paper is detected after complete the paper
eject sequence, the printer detects the "Paper jam error".
Overview
Table 2-2.
PF Motor Specifications
Description
4-Phase/ 48-Pole PM Stepping motor
+42 V +/ - 5% (DRV IC voltage)
10 +/ - 10% (per phase)
10.5 mH +/ - 20%(1kH 1Vrms)
Bi-Polar drive
LB1845
Non paper
Spur Gear 35.2
HP/PE/IC
Sensor
Combination
Gear 22.4, 32
PE Sensor Lever
Low signal
PF Pinion Gear
Revision A
Feeding Paper
Paper
High signal
34