Lifter Gear Train; Stack Lowering Mechanism - Epson Stylus Pro 5000 Service Manual

Stylus Pro 5000

LIFTER GEAR TRAIN

The Lifter Gear Train controls the lifter, which raises the paper hopper.
The Stylus Pro 5000 hopper doesn't go up automatically when the user
inserts the tray into the printer. Instead, the lifter pushes the hopper up
through a hole in the bottom of the paper tray.
D E
Figure 2-7. Lifter Gear Train
The pump/ASF motor powers the lifter gear train. The transmission gear
located under the pump frame drives the sun gear, which drives three
planetary gears. (See "A" in Figure 2-7.)
When the pump/ASF motor rotates to the right, power is transferred from
gear "A" to gear "I" in alphabetical order. Then gear "I" moves the lifter
shaft up and keeps turning during paper loading and upper surface
sensor operation; the lifter is lowered by a separate release lever. For
more on paper loading, see the next section.

STACK LOWERING MECHANISM

The Stack Lowering Mechanism prevents paper from being creased
when the paper load roller picks up the top sheet in the paper tray.
Stack Lowering Mechanism Outline
Paper Tray
Figure 2-8. Stack Lowering Mechanism Operation
When the paper load roller picks up the top sheet from the paper stack,
the paper load roller touches both the hopper and separation pad. To
prevent the top sheet from becoming folded by the rotation of the paper
load roller against both the separation pad and hopper, the lifter lowers
the hopper by 5 mm when the paper is picked up.
Chapter 2 Operating Principles
Paper Load Roller
Hopper
Lifter
Paper Load Roller touches these 2 points
Direction of Rotation
5 mm
Separation Pad
2-7