Controls; Overview - Canon Paper Deck-AF1 Service Manual

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Technology > Controls > Overview

Controls

Overview

Item
1. Pickup block Pickup control The pickup block picks up sheets one by one from the
deck block and hands them over to the feed block.
The flotation fan blows air against the paper so that the
Air assist
paper is shifted slightly to lose attraction, preventing
control
double feeding.
A left flotation fan with an air heater blows hot wind
Air heater
against paper to reduce the humidity, thus facilitating
(option)
control separation of coated paper.
Swing The swing operation of the shutter moves itself up and
down while a flotation fan blows air against paper. The
operation
direction of air blow against paper changes up or down
repeatedly, vibrating the paper for easier separation.
Paper surface When the paper surface sensor detects the top surface
of paper with the upward movement of the lifter, the
detection
lifter stops to keep the top surface of paper at the
pickup position.
Paper When the paper runs out and the paper detecting lever
presence/ of the pickup roller assembly moves past the deck
paper presence/absence sensor, the host machine
absence
detection indicates the absence of paper on its control panel.
control
2. Feed block Feed control Paper fed from each deck is fed to the host machine
via the vertical and horizontal paths.
Double feed The double feeding sensor mounted on the horizontal
path emits ultrasonic sounds like burst and judges
detection
whether double feeding occurs or not according to the
control
(Option) echo level.
2 Technology > Controls > Overview
Explanation of operation Reference
Item
3. Deck open/
Compartment close control
Lifter control
2-7
Lifter error
2-8
detection
control
2-9
Cassette
2-10
heater control
(Option)
Remaining
paper level
2-10
detection
control
Paper size
switching
2-11
control
4. Power Power supply The power supply block supplies DC power to the
supply block
5. Others Jam detection The signal from the sensor is read at the check timing
2-11
2-13
Explanation of operation
When the deck open switch is pressed, the lifter starts
to descend. When the lifter HP sensor detects the
home position of the lifter, the lifter stops and the deck
open/close solenoid turns on to unlock the deck.
The lifter is connected to the drive shaft via a cable,
and is moved up or down by the deck lifter motor.
When the lifter moves up or down, three types of error
detection are performed, i.e., upper limit detection
to prevent excessive ascension of lifter, lower limit
detection to prevent excessive descension of lifter, and
foreign object detection to stop the lifter to prevent the
equipment from being damaged.
The cassette heater makes the temperature inside the
deck suitable to reduce the humidity, thus facilitating
separation of paper.
The level of the paper remaining in the deck is detected
by counting the lifter motor pulses that represent
the distance of movement of paper from the lifter HP
sensor to the paper surface sensor.
To switch between paper sizes, move the side and
rear guide plates to suit the paper side and enter the
appropriate paper size in the user mode.
motors, solenoids, clutches, and other components.
recorded in the host machine to judge whether paper is
present and fed normally.
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Reference
2-14
2-15
2-16
2-17
2-17
2-18
2-21
2-19
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