Epson 2200 - Stylus Photo Color Inkjet Printer Service Manual page 50

EPSON Stylus PHOTO 2100/2200
2.2.3.3 ASF Paper Feeding Operation
Using the driving force transmitted from the ASF/Pump motor via the DE mechanism,
the ASF unit performs the following paper feeding operation.
To achieve stable paper feeding operation of the paper feeding mechanism of this
product, the double-feed prevention mechanism is installed in the ASF. To prevent
paper from dropping into the paper path from the paper setting position in the ASF
unit, the Paper return lever returns the paper to within the ASF hopper securely, and the
LD roller then starts paper feeding operation. Refer to the following steps for details of
the paper feeding operation including that of the double-feed prevention mechanism.
1. At power-on, the ASF/Pump motor rotates in the CCW direction and the ASF
home position is detected. Then, the ASF/Pump motor rotates in the CW direction
by the specified number of steps, thereby setting the LD roller and Paper return
lever in the paper feeding standby position. Refer to [Standby status] in Figure 2-7,
"Paper Feeding Operation".
2. When you give a paper feeding command from the PC and press the Paper switch
on the panel, the ASF/Pump motor rotates in the CCW direction and the LD roller
starts paper feeding. Refer to [Paper feeding status] in Figure 2-7, "Paper Feeding
Operation".
3. When the paper is transferred from the ASF unit to the PF roller and detected by
the PE sensor, the LD roller stops in the position where the friction of the LD roller
is cleared. Refer to [PF roller passing status] in Figure 2-7, "Paper Feeding
Operation".
4. Then when you give a print command and press the Paper switch on the panel, the
ASF/Pump motor rotates in the CW direction by the specified number of steps,
thereby setting the LD roller and Paper return lever in the paper feeding standby
position. Refer to [Standby status] in Figure 2-7, "Paper Feeding Operation".
OPERATING PRINCIPLES
LD roller
Paper feed
roller(Cam)
Pad
Return
lever
[Standby status]
Figure 2-7. Paper Feeding Operation
Printer Mechanism
Hopper spring
2
Pad spring
[Paper feeding status] [PF roller passing status]
Revision B
Pinch roller
3
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