Sub Roller Gear Train; Gear Train Disengagement - Epson Stylus Pro 5000 Service Manual

Stylus Pro 5000

SUB ROLLER GEAR TRAIN

The pump/ASF motor drives the sub roller when the motor rotates in
reverse. The sub roller is used in all four paper paths. Figure 2-13 shows
the gear train.
Sub Roller Driver Gear
Figure 2-13. Sub Roller Gear Train
The pump/ASF motor rotates in reverse, driving the sun gear marked "A"
in Figure 2-13. This drives planetary gear 3, which drives the
transmission gear (located behind Gear "B"). Then planetary gear 4
(Gear "C" in the figure) moves up to engage the sub roller driver gear.

GEAR TRAIN DISENGAGEMENT

To prevent accidents, the lifter gear train is disengaged when the paper
tray is not installed. The lifter will return to its idle position if the paper tray
is removed while the printer is loading paper. The main board prevents
the lifter from being raised when the paper tray is not installed. Figure 2 -
14 shows the parts involved in gear train disengagement.
Sun Gear
1
Lever:
Moves to the right
when the paper tray is installed.
Figure 2-14. Gear Train Disengagement
When the paper tray is installed, a lever slides back (to the right in Figure
2-14), as does the slider plate. (See "1" in Figure 2-14.) The slider plate
has teeth that engage with the small cam gear. (See "2" in Figure 2-14.)
This cam gear is under the sun gear, behind the planetary gear 2. (See
Figure 2-13.) When the slider plate moves to the right, the cam gear
rotates left. As a result, the cam moves up, pushing planetary gear 2 to
the right.
Chapter 2 Operating Principles
Cam
Small Cam Gear
rotates left.
Slider Plate: This also
moves right.
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