Gestetner A294, Service Manual

Page: 134 / 600

PAPER FEED
A294/A295 2-84 SM
Paper Lift/Remaining Paper Detection
The machine detects when the 1st tray has been placed in the machine by
monitoring the tray set signal through the connector.
When the machine detects that the 1st paper tray is set in the machine, the right
1st tray paper sensor [N] (under the tray) checks whether there is paper in the right
tandem tray.
NOTE: The right half of the tray holds up to 1,000 sheets. So, if the right 1st tray
paper sensor was not present and the tray was empty, the bottom plate
would have to lift up fully until the paper end sensor at the top of the tray
detected that there was no paper, and this would waste several seconds.
If paper is detected, the lift motor [A] rotates and the coupling gear [B] on the tray
lift motor engages the pin [C] of the lift shaft [D]. The tray wires [E] are fixed in the
slots [F] at the ends of the tray support rods [G, H]. When the lift motor rotates
clockwise, the tray support rods and the tray bottom plate [I] move upward. The
tray goes up until the top paper pushes up the pick-up roller and the lift sensor in
the 1st feed unit is activated, and the paper end sensor at the top of the tray is
deactivated.
When the actuator [K] on the front end of the right support rod [G] activates the
paper height sensors [J], the remaining paper capacity is detected (4 levels).
When removing the tray, the coupling gear [B] separates from the pin [C], so that
the tray bottom plate moves downward. The tray lowers until the actuator activates
the tray down sensor [L]. The damper [M] lets the tray bottom plate drop down
slowly.
A294D710.WMF
[E]
[A]
[B]
[N]
[C]
[L] [G]
[I]
[D]
[M]
[H]
[F]
[K]
[J]
[E]
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA