EPSON Stylus
COLOR
1520
Rev. A
2-6
2.2.4 Paper Feed Mechanism
The paper feed mechanism of this printer consists of the integrated ASF (Auto Sheet Feeder)
mechanism, tractor mechanism, PF (Paper Feed) motor, front/rear PE (Paper End) sensors, PF roller,
paper guide mechanism, paper eject unit, and PF motor drive disengage mechanism. The torque from
the PF motor drives the paper load mechanism, paper feed mechanism and paper eject mechanism.
While the printer is not printing, the PF motor drive disengage mechanism switches the torque from the
PF motor to the pump mechanism, which depends on the CR position. While the paper feed mechanism
is driven, the torque from the PF motor is transmitted via PF motor pinion gear and disengage gear to
the PF roller., where the torque is then divided into 2 directions. One is transmitted to the paper eject
mechanism via the gear train in the paper guide assembly. The other is transmitted to the ASF
mechanism via the transmission gear.
The tractor drive gear train is set at the left end of the PF roller. Table 2-4 and Table 2-5 shows the
specification for the PF motor and PF motor drive terms, respectively. Figure 2-5 illustrates the paper
feed mechanism.
Item
Description
Motor type
4-phases / 96-pole / HB type stepping motor
Drive voltage
42 VDC
5% (The voltage applied to the driver)
Coil resistance
10
10% (at 25
C per 1 phase)
Connection
Bipolar
Excitation mode
2-2 phase, 1-2 phase, W1-2 phase constant current drive
Minimum step
1/720 inch / step (2-2 phase drive)
Operation
mode
Acceleration
Constant
Deceleration
Stand-by
Paper feed
(Line feed:6/1 inch)
0.9/0.9
0.9
0.75/0.75
0.6
ASF Feed
0.9/0.9
0.9
0.75/0.75
0.6
Pump driven
/0.9
0.9
0.9
0.6
Pump driven
(slow)
/
0.9
/
0.6
Note) Double 1-2 phase drive / 2-2 phase drive
Table 2-4 PF Motor Specification
Table 2-5 PF Motor Drive Terms
Tractor Disengage Gear
PF Motor
PF Motor Pinion Gear
Disengage Gear
To the tractor
mechanism.
To the ASF
mechanism.
ASF
Transmission Gear
PF Drive Roller
Paper Eject Roller Shaft
Pump Mechanism
Paper Eject Roller Shaft
Paper Eject Roller Unit
Figure 2-5. Paper Feeding Mechanism
Summary of Contents for 1520 - Stylus Color Inkjet Printer
Page 138: ...Maintenance Rev A 6 5 8 9 10 10 10 10 10 10 10 10 Figure 6 2 Lubrication Points 2 ...
Page 146: ...Appendix Rev A A 7 A 2 Circuit Diagrams Figure A A 2 C211 MAIN B Board Circuit Diagram 1 2 ...
Page 147: ...EPSON Stylus COLOR 1520 Rev A A 8 ...
Page 148: ...Appendix Rev A A 9 Figure A A 3 C211 MAIN B Board Circuit Diagram 2 2 ...
Page 149: ...EPSON Stylus COLOR 1520 Rev A A 10 ...
Page 152: ...Appendix Rev A A 13 A 3 Component Layout Figure A A 6 C211 MAIN B Board Component Layout ...
Page 153: ...EPSON Stylus COLOR 1520 Rev A A 14 Figure A A 7 C172 PSB Board Component Layout ...
Page 154: ...Appendix Rev A A 15 Figure A A 8 C172 PSE Board Component Layout ...
Page 156: ...Appendix Rev A A 17 Figure A A 10 Stylus COLOR 1520 Exploded Diagram 2 ...
Page 157: ...EPSON Stylus COLOR 1520 Rev A A 18 Figure A A 11 Stylus Color 1520 Exploded Diagram 3 ...
Page 165: ...EPSON SEIKO EPSON CORPORATION ...
