Feed Roller Eccentricity Detection Function; Structure Of Ejection Sour - Canon imagePROGRAF iPF5000 Series Service Manual

Chapter 2

2.3.3.2.9 Feed Roller Eccentricity Detection Function

Media are fed by the feed roller at regular intervals.
Irregular feeding of media due to the feed roller eccentricity problem, irregular printing can occur in the media feeding direction periodically.
To prevent this, the feed error encoder and feed roller HP sensor detect the presence and amount of feed roller eccentricity every rotation of the feed roller.
This function is called the feed roller eccentricity detection function. If eccentricity is detected, the media feed mount is compensated for according to the amount
of eccentricity.
feed roller encoder

2.3.3.2.10 Structure of Ejection Sour

a) Outline
The ejection spur unit consists of a spur, a spur motor that moves the spur, a spur cam sensor, and an eject roller.
b) Spur lift mechanism
The spur must be moved up and down according to the selected media type and feed mode. The spur motor and spur cam sensor are used to control the spur stop
position.
- In case of manual feed from front
When the above mode is selected in the user mode, the spur moves to the upper limit position and then stops.
- Stop position depending on media type
To prevent the spur from damaging the media, the spur stops at a proper position according to the media type selected in the user mode.
c) Eject roller drive
The drive power of the eject roller is transmitted from the feed roller via the drive belt.
2-28
feed roller HP sensor
Media
Feed roller
Not decentered
Feed roller
once
F-2-37
Decentered
Feed amount
Feed roller
once
F-2-38
0013-4206
0013-4208