Paper Loading Mechanism; Drive Transmission To The Asf Unit - Epson Stylus PHOTO 2000P Service Manual

EPSON Stylus PHOTO 2000P

2.1.6 Paper Loading Mechanism

The paper loading mechanism loads paper at the ASF unit and feeds
paper to the PF rollers. The ASF unit is the same as in previous models. A
4-phase 48-pole PM type stepping motor is used as the ASF/Pump motor
to drive ASF. Drive sent from this motor is transmitted to the ASF side
and Pump side via the disengage mechanism (DE mechanism). See
Figure 2-12 for the ASF/Pump motor specifications.
Table 2-12. ASF/Pump Motor Specifications
Table 2-13.
Items
Motor type
Drive method
Drive voltage
Coil Resistance
Inductance
Drive from the ASF/Pump motor is sent to the ASF unit by the switching
operation of the carriage unit and the DE mechanism described in the
following section.
OPERATING PRINCIPLES
Description
4 Phase/ 48-pole /PM type pulse motor
Bipolar constant current drive
+42V +/- 5% (applied to the driver)
10.4 ohm +/- 10%
15.0 ohm +/- 10%

2.1.6.1 Drive Transmission to the ASF Unit

1) The CR unit moves to the right end of the CR shaft, which then pushes
the DE lock lever to the right end.
2) The ASF/Pump motor rotates counterclockwise specified steps
(viewed from the motor pinion gear side).
3) With the ASF-Pump motor's rotation of step 2), the planetary gear set
in the DE unit shifts toward the combination gear (12, 22.4).
4) The carriage unit moves from the right end of the CR shaft specified
steps, which causes the DE lock lever to fix the planetary gear unit.
5) Torque from the ASF/Pump motor is transmitted as described below.
Motor pinion gear
→
(12, 22.4) Combination gear (14, 28)
Figure 2-8 shows the disengage mechanism and its parts.
Combination Gear
14, 28
ASF-Pump Motor Pinion Gear
Figure 2-8. Disengage Mechanism
The ASF unit loads paper by the torque sent from the ASF/Pump motor
via the DE mechanism as described in the following section.
Overview
→ →
Planetary gear (15.2) Combination gear
→
Spur gear (32) in ASF
Combination Gear 12, 22.4
Planetary Gear 15.2 Unit
DE Lock Lever
A
Combination Gear 17.19, 25.6
Revision A
39