Paper Detection/Lift; Mechanism - Ricoh B234 Service Manual

DETAILED DESCRIPTIONS

2.2 PAPER DETECTION/LIFT

2.2.1 MECHANISM

[E]
⇒
[I]
Detection
When the tray set in the machine, the tray is detected by the drawer connector on
the back side of the tray.
Lift
When the machine detects that the paper tray is set in the machine:
• The tray lift motor [A] rotates forward
• Coupling gear [B] on the tray lift motor engages pin [C] of the lift drive shaft.
• The tray drive belts [D], connected to the tray bottom plate [E], are driven by the
tray lift motor via the lift drive shaft and tray lift pulleys [F].
• When the lift motor rotates forward, the tray bottom plate [E] rises. The tray rises
until the top of the paper stack pushes up the pick-up roller and the lift sensor in
the feed unit is de-activated.
• When the actuator [G] on the rear end of the bottom plate activates the paper
height sensors [H], the remaining paper capacity is detected.
When the tray is pulled out:
• Coupling gear [B] separates from pin [C] and the tray bottom plate goes down.
• A damper [I] slows the descent of the bottom plate. For the B834, all three trays
have this damper.
B834
[D]
[C]
[B]
[A]
B834D109.WMF
24
Rev.09/2006
[F]
[H]
[G]
SM