Remaining Paper Detection

The paper remaining is detected by counting pulses of the LCIT lift motor [A], and is shown in a four-stage display on the operation panel.

When the bottom plate is lower than the paper height middle sensor [B], the remaining indicator is affected by the pulse count that starts when the plate passes the lower limit sensor [C]. When the stack of paper is finished, the bottom plate moves up and passes the paper height middle sensor, and the indicator is affected by the pulse count that is reset and restarts when the plate passes the paper height middle sensor.

Relationship between Sensor State and Paper Remaining

• When the upper limit is detected and the lower limit sensor detects, the output pulses of the LCIT lift motor are not counted and the remaining amount is determined as 100 %.
• When the upper limit is detected and the paper height middle sensor detects, the output pulses of the LCIT lift motor are not counted and the remaining amount is determined as 50 %.
• When the bottom plate passes the lower limit sensor, the pulse count for the LCIT lift motor starts.
• When the paper height middle sensor detects, the pulse count for the LCIT lift motor resets. Then, when the bottom plate passes the lower limit sensor, the count starts.
• When paper remaining is 5 % or less, it is determined as 5 % until the paper end.
• When the paper height middle sensor detects, the remaining amount is determined as 50 % regardless of the state of the lower limit sensor and the output pulses of the LCIT lift motor.
• The pulse count is cleared when no tray is in the LCIT.