PAPER BANK 1 March, 2000
2-8
2.1.5 TRAY UPPER LIMIT DETECTION AND PAPER HEIGHT
CONTROL
The tray goes up until the top of the paper stack pushes up the paper pick-up roller
[A] and the actuator [B] activates the upper limit sensor [C] to stop the tray lift
motor.
When tray 1 contains a large paper size (such as A3), the tandem tray sensor [D] is
covered and the machine detects that this tray is not being used as a tandem tray.
In such a case, the left and right bottom plates both must lift the paper to the
correct feed height. The right tray upper limit sensor operates as explained above
([C] in the top diagram). However, for the left bottom plate, the left tray upper limit
sensor [E] detects when the stack is at the correct height. (The actuator is curved
so that it is not damaged when a paper stack is moved from left to right when the
tray is in tandem mode.) This sensor is only used when tray 1 is not being used as
a tandem tray.
C232D006.WMF
C232D010.WMF
[A]
[B]
[C]
[D]
[E]
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