Canon DADF-R1, Service Manual

Page: 87 / 222

Chapter 3
3-29
3.6 Feeding Unit
3.6.1 Outline of CW Pickup/Delivery
0013-3489
The machine uses CW pickup/delivery both in fixed reading mode and in stream reading mode.
T-3-11
The machine uses fixed reading mode for the following:
- the magnification is set to 201% or higher.
- the machine has identified the original as being of a non-default size.
- Stream reading is disabled in the host machine's service mode.
- the host machine has detected soiling of the copyboard glass.
3.6.2 CW Pickup/Delivery Fixed Reading
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In fixed reading, the original is held in place on the copyboard glass, and is read by the scanner being moved by
the host machine. Specifically,
A. Single-Sided Original
1) The machine picks up the 1st original, and butts its lead edge against the registration roller to remove the
skew. (For details of pickup operation, see 'Original Pickup/Separation.')
F-3-35
Operation Mode of operation Printing mode
Printing mode fixed reading single-sided original -> signal-sided print
(magnification: between 201% and 400%)
single-sided original -> double-sided print
(magnification: between 201% and 400%)
stream reading single-sided original -> double-sided print
(magnification: between 50% and 200%)
single-sided original -> double-sided print
(magnification: between 50% and 200%)
Registration roller
1st original