Canon iR C2880 Series Service Manual page 182

Chapter 5
Function
SEND
1. Moving Forward to Scan an Image
when scanning the image, the machine controls the contact image sensor (CIS) by controlling the motor as follows:
Start position
Travel
2. Moving in Reverse After an Image Scan
The machine maintains a specific speed (147 mm/sec) to move the contact image sensor (CIS) to shading position after making an image scan.
5-8
Mode
black-and-white mode
full-color mode (originals other than of 300 dpi or lower; 320x450m 12"x18")
full-color mode (originals of 300 dpi or lower; 320x450, 12"x18")
black-and-white mode
Original leading edge
Accelerated
speed
[1] [2]
Travel distance
[1] acceleration area: accelerates to a speed suited to the selected mode.
[2] margin area: drives to ensure a specific speed.
[3] image read area: scans an image at a specific speed.
[4] deceleration area: after the trailing edge of the image, decelerates and stops.
Original
trailing edge
Decelerated
Normal speed
[3]
F-5-12
Scan speed
118 mm/sec
236 mm/sec
118 mm/sec
236 mm/sec
Stop
[4]