Shift Tray Up/Down Movement - Gestetner A294 Service Manual

2.7 SHIFT TRAY UP/DOWN MOVEMENT

[A]
[K]
The shift tray lift motor [A] controls the vertical position of the shift tray [B] through
gears and timing belts [C]. When the main switch is turned on, the tray is initialized
at the upper position. The tray is moved up until stack height sensor 1 [D] is de-
actuated.
In sort/stack mode, if stack height sensor 2 [E] is actuated for 2 seconds, the shift
tray lift motor lowers the shift tray for 20 ms.
In staple mode, when the pawl on the stack feed-out belt reaches the upper
position of the staple unit, the shift tray lift motor lowers the shift tray for 400 ms
and stops for 200 ms. Then, it lifts the shift tray until stack height sensor 1 is de-
actuated by the feeler [F]. This means the tray lowers earlier in staple mode, to
prevent the next copy suddenly exceeding the space currently available on the
tray.
For both modes, the shift tray will rise until stack height sensor 1 is de-actuated
when the user takes the stack of paper from the shift tray.
This machine has two shift tray lower limit sensors 1 [G], 2 [H]. Shift tray lower limit
sensor 1 detects the near lower limit and sensor 2 detects the lower limit. When the
actuator [I] enters sensor 1, a message will be displayed and copying will continue.
When the actuator enters sensor 2, a message will be displayed and copying will
stop.
The shift tray upper limit switch [J] prevents the drive gear from being damaged if
stack height sensor 1 fails. When the shift tray pushes up the shift tray positioning
roller [K], the switch will cut the power to the shift tray lift motor.
SM
CÓPIA NÃO CONTROLADA
[D]
[E]
[G]
[J]
[H]
8-15
CÓPIA NÃO CONTROLADA
SHIFT TRAY UP/DOWN MOVEMENT
[F]
[I]
[C]
B302D010.WMF
[B]
A294/A295