Ricoh K-C3.5L, Обучение по обслуживанию

Страница: 149 / 193

Model K-C3.5L
149
Ricoh Co. Ltd. http://www.ricoh.com/
Slide 149
Paper Lift - Pressure Application
Lift sensor
Lift motor
Main pressure spring
Secondary pressure spring
Bottom plate pressure lever
‰
When the lift sensor is
activated, the lift motor
reverses briefly to reduce the
feed pressure
More on Paper Lift – Pressure Application
‰
This slide shows how the tray is lifted.
‰
The lift motor turns on, and turns clockwise as viewed on the diagram.
¾
The main pressure spring pulls the bottom plate pressure lever, and this lifts
the tray bottom plate.
‰
When the top of the stack touches the feed roller, the motor cannot pull up the
plate any more, so it pulls the actuator into the lift sensor.
¾
The pressure of the feed roller on the paper is now too high, so the lift
motor now reverses to reduce this pressure. It reverses for 200 ms or 600
ms, depending on the paper size. For smaller paper, it reverses the larger
amount (600 ms) to reduce the pressure more.
¾
The lift motor reverse timing can be adjusted with SP1-908-1, to change the
pressure from the main pressure spring.
If the pressure is too strong, the sheet of paper may not be fed smoothly,
and if it is too weak, more than one sheet of paper may be fed at a time.
¾
For A4-LEF, A3-SEF, and B4-SEF paper, a projection on the side fence
engages the secondary pressure spring, to ensure that extra pressure is
applied to wider paper.
‰
Finally, when the tray is pulled out, the lift motor reverses for 1.7 ms. This makes
it easier to put the tray back.