3. Original Feed and Separation
To feed the original, the paper feed motor and the paper transport motor
(which drives the paper transport drum) turn on. The paper feed motor drives
the pick-up roller [A] through a train of gears and the pick-up clutch [B]. The
pick-up clutch turns on to feed the top sheet of the original. If the pick-up
roller feeds multiple pages of the original, these pages are separated by the
separation roller [C] and the feed roller [D] (the separation mechasnism is
friction-based).
When the leading edge of the original activates the feed sensor [E], the paper
feed motor and the pick-up clutch turn off. then the original is fed by the
paper transport drum [F] to the scanning position.
4. Image Scanning
The scanner starts to scan the image when the leading edge has passed the
read sensor by a certain distance (measured by motor pulses).
5. Scanning End
When the cpu has fed the trailing edge of the original 30 mm past the feed
out sensor, the transport motor turns off.
[A]
[B]
[C]
[D]
[E]
[F]
g404d531.wmf
DETAILED SECTION DESCRIPTIONS
October 9th, 1995
SCANNER PROCESS
2-12
