Ricoh Di-C1.5a Manual page 336

Stack Height Detection
Stack Height
Sensor 1
Stack Height
Sensor 2
Slide 336
This shows how the stack height is detected. If the stack height is above a set
level, the output tray must move down.
The outputs from the two sensors tell the machine what to do.
Sensor 1 and 2 both off: The stack height is below the target. The output
tray is then lifted to the target position.
Sensor 1 on, sensor 2 off: Target stack height position
Sensor 1 and 2 both on: The stack height is above the target. The output
tray is then lowered to the target position.
Sensor 1 off, sensor 2 on: The stack height detection lever is at home
position.
'Off' means 'Actuator not in sensor'
At the start of a print job, the solenoid turns on. The stack height detection lever
comes down, to detect the current stack level.
When a sheet of paper is being fed out, the solenoid turns off and the lever goes
back up to home position (inside the unit).
After paper has been fed out, the solenoid turns on again, and the lever detects
the level of the stack.
Stack Height
Detection Lever
Stack Height
Lever Solenoid
336
Di-C1.5 Training
Stack height lever
solenoid: Moves
the detection
lever to the top of
the stack
Stack height
sensors: These
make sure that
the top of the
stack is at the
correct height.