Epson 2200 - Stylus Photo Color Inkjet Printer Service Manual page 49

EPSON Stylus PHOTO 2100/2200
2.2.3.1 ASF Paper Feeding Mechanism
Table 2-9. ASF/Pump Motor Specifications
Item
Type 4-phase, 48-pole PM type stepping motor
Drive method Bipolar drive/constant-current drive
Drive voltage +42V +/- 5% (voltage applied to driver)
Winding resistance 7.0Ω +/- 10% (per phase at 25°C)
Inductance 10.0mH +/- 20% (1kH 1Vrms)
The following table indicates the rotation directions for driving the ASF unit/pump
mechanism.
Table 2-10. ASF/Pump Motor Rotation Directions
Rotation ASF Paper Feed
D/E
Direction Roller Operation
Pump switching Paper return lever
*a
CW
direction
ASF switching
*b
CCW
direction
*a: CW (CW is defined as the clockwise direction as viewed from the ASF/
Pump motor pinion)
*b: CCW (CCW is defined as the counterclockwise direction as viewed from
the ASF/Pump motor pinion)
The driving force of the ASF/Pump motor is transmitted to the ASF unit by the
Carriage unit operation and DE mechanism switching operation described in the
following section.
OPERATING PRINCIPLES
Specifications
Pump Operation
Pump suction/wiper setting
setting
Pump releasing
Paper feed
Wiper resetting
2.2.3.2 Drive Transmission Path to ASF Unit
1. The Carriage unit moves to the right end of the Carriage guide shaft to move the
DE lock lever to the right end.
2. The ASF/Pump motor rotates in the CCW direction (as viewed from the motor
pinion gear side) by the specified number of steps.
3. As the ASF/Pump motor rotates in the CCW direction, the Planetary lever unit in
the DE mechanism moves toward the combination gear 12, 22.4.
4. As the Carriage unit moves leftward from the right end of the Carriage guide shaft
by the specified number of steps, the DE lock lever fixes the Planetary lever unit.
5. The driving force of the ASF/Pump motor is transmitted in the following path.
Motor pinion gear → Planetary lever unit → Combination gear 12, 22.4 →
Combination gear 14, 28 → Spur gear 32 (ASF side)
The following shows the part names and operation outline of the DE mechanism.
Combination gear 14, 28
Combination gear
12, 22.4
Printer Mechanism
Planetary lever unit
DE lock lever
ASF/Pump motor
Combination gear 17.19, 25.6
pinion gear
Figure 2-6. DE Mechanism
Revision B
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