Canon iPF710 - imagePROGRAF Color Inkjet Printer, Service Manual

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Chapter 2
2-35
2.3.3.2 Paper Path
2.3.3.2.1 Structure of Feed Roller Unit
0017-
a) Feed roller assembly
The feed roller assembly consists mainly of a feed roller that is driven by the feed motor, a pinch roller unit that
follows up the motion of the feed roller and so on.
Paper is fed horizontally under the printhead on the carriage as it is kept level on the platen to prevent heaving.
b) Sensors
The feed roller assembly includes a feed status detection sensor and paper passage mechanical component status
detection sensors.
c) Roll media rewind drive unit
The paper feed unit is provided with a roll media rewind drive to prevent paper from slacking during roll media
feed. The rewind drive turns on the roll media rewinding clutch to rewind the roll media.
The roll media rewinding clutch can be turned on only when the roll media is fed during the backward feed. The
feed motor rotates the roll holder to rewind the roll media. During the forward feed, the roll media rewinding
clutch is held off.
F-2-22
Paper release lever
Pinch roller
Printhead
Roll media
Roll holder
Feed roller
Feed roller HP sensor
Feed roller encoder sensor
Feed motor
Roll media rewinding clutch