Paper Feed - Epson EPL-N2700 Service Manual

EPSON EPL-N2700 / N2750

2.1.4.3 Paper Feed

The paper taken up by the paper take-up section is fed to the transfer
section after registration compensation.
Registration Compensation
o
To eliminate any paper slant (skew), registration compensation is
made by controlling the rotating timing of the paper take-up roller
and timing roller.
The taken up paper passes the timing roller sensor (PC2) and
reaches the timing roller. At this moment, the printer delays turning
timing of the timing roller for a moment. As a result, the leading edge
of the paper is aligned with the timing roller, eliminating any skew.
The leading edge of the paper will slack a little as shown in the
figure. Next, the timing clutch (CL1) is activated for feeding the
paper to the inside of the printer. At the same time, the paper take-
up roller turns for a moment to securely feed the paper.
Timing Roller
Slack of paper
Paper Take-up
3
Roller
Paper
[Registration compensation]
Figure 2-17. Registration Compensation
Operating Principles
Transport Motor (M2)
1
2
Slack
Timing Roller Sensor (PC2)
4108s030
Printer Mechanism Operating Principles
Paper Feeding
o
When the timing clutch (CL1) is activated, torque is transmitted to
the timing roller from the transport motor (M2) as follows and the
paper is fed to the transfer section.
1) The transport motor (M2) turns counterclockwise. → 2) The idle
gear turns clockwise. The timing clutch (CL1) turns ON. → 3) The
idle gear turns counterclockwise. → 4) The timing roller turns
clockwise. → Paper is fed.
The PC drum is driven by the I/C drive motor (M1). As the PC drum
turns, the transfer roller also turns. Accordingly, the paper fed by the
timing roller is pinched by the PC drum and transfer roller for feeding
to the fusing section.
Retry of paper feeding
n
If the timing roller front sensor does not detect the fed paper
within certain time, paper feeding is performed again.
PC Drum
Timing Roller
Paper Path
Figure 2-18. Paper Feeding Mechanism
Revision B
Transfer Roller
Transport Motor
4 (M2)
1
Timing
Clutch (CL1)
3
2
4108s031
74