Paper Feed Mechanism; Paper Feed Operation - Epson EPL-5700 Service Manual

EPL-5700

2.1.3 Paper Feed Mechanism

Paper feed mechanism is shown below.
Paper Feed Sensor(PS1)
Paper Feed Clutch
Paper Feed Solenoid
Figure 2-3. Paper Feed Mechanism

2.1.3.1 Paper Feed Operation

1. When the paper feed solenoid(SL1) is turned on, the driving power from
main motor(M1) is transmitted to the paper feed roller through the paper
feed clutch(one way clutch), then, the paper feed roller rotates.
2. At the same time, the push down cam also rotates, then, the tray lifting
plate stands up. The paper in the tray is carried into the printer by the
paper feed roller. (see figure2-4)
Rev. A
Paper Empty Sensor(SE1)
Paper Feed Roller
Push down Cam
Tray Lifting Plate
Tray
3. Separation pad method is used in order to separate each paper and
prevents of feeding the second paper together.
4. Since there is no paper size sensor mechanism in the multi paper feed
tray, the printer detects the length of paper by ON time of paper feed
sensor(PS1), and judges the paper size. So, even if the paper has the
same length, the printer judges the paper as the same size even its width
is different.
Waiting mode
Tray Lifting Board
During paper feeding
Figure 2-4. Paper Feed Operation
Chapter2 Operating Principles
Push down Cam
Paper Feed
Roller
Tray
2-3