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Tray Level Lift and Sensing
The paper level within the trays must be maintained within a certain height range for proper
paper feeding into the machine. This is achieved by the Tray Level Left mechanism and the
Stack Height Sensor within each Paper Tray.
rotation and the resulting action.
As paper is fed from the tray, the following process keeps the paper at the correct height to feed
into the machine:
1.
Paper level in the tray drops as paper is fed into the machine.
2.
As the paper level drops, the Nudger Roll also drops further into the tray to reach the top
sheet of paper. The Nudger Roll Solenoid activates, allowing a spring to push the Nudger
Roller onto the paper stack
3.
When the Nudger Roll drops into the tray to a certain level, a flag on the Nudger Roll
mechanism blocks the Stack Height Sensor.
4.
When the Stack Height Sensor is blocked, its output line to the IOT Drive and Control
PWBAs changes its level.
5.
The IOT CPU and Drive PWBAs activate the Feed Motor for that tray, causing it run in the
clockwise direction.
6.
The Feed Motor running in a clockwise direction results in:
•
The Nudger Roll stops rotating, because of its one-way clutch.
•
The Feed Roll stops rotating, again due to a one-way clutch.
•
The Lift Shaft starts turning, raising the paper level in the tray.
7.
As the paper level rises, it raises the Nudger until the Stack Height Sensor is no longer
blocked.
8.
When the Stack Height Sensor is no longer blocked, its output line to the IOT Drive and
Control PWBAs changes back to its original level.
9.
The IOT CPU and Drive PWBAs activate the tray's Feed Motor in the counter-clockwise
direction.
10. The Feed Motor running in the counter-clockwise direction results in:
•
The Paper Tray Level Lift stops rising.
•
The Nudger Roll starts rotating.
•
The Feed Roll starts rotating.
11. The paper is at the proper height and is fed into the machine.
When opening or removing the Paper Trays from the machine, the tray's Paper Level Lift Mech-
anism automatically drops the paper level. Inserting or closing the Paper Trays automatically
raises the paper level by the Paper Feed Motor.
Principles of Operation
Tray Level Lift and Sensing
Figure 1
shows the relationship between motor
1/05
10-96
manuals4you.com
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Figure 1 Tray Motor Rotation
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Troubleshooting
