DETAILS
SM 25 B835
Cover
Interposer
Tray
B835
2.2 PAPER FEED
2.2.1 FEED MECHANISM
When paper is placed on the tray, the 1st paper set sensor in the tray actuates and
switches on the 1st tray lift motor. The pick-up roller unit drops and the top of the
stack in the tray pushes up the pick-up roller unit until its actuator actuates the 1st
bottom plate position sensor [A] and switches the motor 1st tray lift motor off.
The 1st pick-up roller HP sensor [B] controls the operation of the 1st pick-up motor
[C]. The 1st pick-up motor is off when the actuator is up and there is no paper in
the tray. This is the pick-up roller home position. When the actuator de-actuates the
sensor after the tray lifts, this switches on the 1st pick-up roller motor. At the end of
the job, the actuator descends with the bottom plate and switches the motor off.
The pick-up roller [D] picks up the sheet, and the feed belt [E] feeds the sheet to
the paper feed roller [F]. The separation roller [G] reverses if more than one sheet
is fed. This is a standard FFR device.
The paper feed sensor [H] detects the timing of the feed and signals a jam if the
paper does not arrive or if the paper stops.
As sheets feed from the top of the stack:
• The pick-up roller unit descends until the actuator on the pick-up roller unit drops
out of the 1st bottom plate position sensor [A]. This activates the 1st tray lift
motor.
• The 1st tray lift motor switches on to raise the stack until the actuator enters the
pick-up roller unit position sensor again and switches the lift motor off.
• This cycle repeats until the end of the job or until paper runs out.
B835D111.WMF
B835D112.WMF
[A]
[B]
[C]
[D]
[E]
[F]
[G]
[H]
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