Canon W8400 Series, Service Manual, Page: 76 / 224

Chapter 2
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3) Drive the carriage and detect the media left edge (momentarily stop carriage return movement when detected).
4) Drive the carriage and move the registration sensor over the media.
5) Detect tentatively the media right edge (temporarily stop return movement of the carriage when
detected).
6) Drive the carriage and move the registration sensor to media right edge detection start position (30mm inside the media right edge tentative detection
position: on media).
7.End cut media feeding
8.Print
2.3.3.1.4 Media delivery
0009-9376
If the cutter is enabled when using roll media, the media is fed to the cut position after printing and cut using the cutter. Then, the roll media on the platen
is fed by approximately 100 mm, and the cut roll media is pushed out. The discharged sheet is stacked on the stacker with the printed side faced down.
The roll media on the platen returns to the print standby position.
For continuous banner printing with roll media, the printer pauses without cutting the paper and performs maintenance operations such as print head
cleaning.
The printed cut sheet stops on the platen, and a message is displayed when printing is finished.
MEMO:
When offline, press the key to discharge the media and the key to rewind the media.
2.3.3.2 Paper Path
2.3.3.2.1 Structure of feed rollers
0009-1522
a) Feed roller unit
The feed roller unit consists of media feeding mechanisms, including feed rollers driven by the feed motor and the pinch roller unit operating in conjunction
with the feed rollers.
To ensure that no waves form on the media, the paper remains flat as it passes over the platen so that it is carried horizontally as it passes under the printhead
of the carriage.
b) Detection unit
The paper feed unit includes sensors for monitoring the media feeding status and sensors for monitoring the status of the component parts of the paper path.
For more information, see Technical Reference > Detection Functions Based Sensors.
c) Roll media spool unit
The paper feed unit has a roll media spool drive unit to prevent the media from sagging when feeding. The spool drive unit rewinds the roll media when
the spool clutch is activated.
The spool clutch is activated only when the roll media is fed backward during feeding. The drive force is conveyed from the feed motor and winds the
media by rotating the roll holder. The spool clutch is deactivated when feeding forward.