ADF theory
ADF theory of operation
ADF cross section
1 Document sensor
2 Pickup roller
3 Separator roller
4 Stage and interval sensors
5 Paperfeed 1 roller
6 Paperfeed 2 roller
7 Feed sensor
8 Scan area
9 Duplex sensor
10 Eject 2 roll
11 Exit roller
The duplex ADF enables the user to create duplex scans automatically, eliminating the need to stop the scanning process
to flip the media being duplicated over. The ADF uses DC motors with encoder wheels, and a series of sensors to
determine the media’s position in the paper path during the scan process. The following steps are performed in creating
a duplex scan on the duplex ADF:
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Appendix C: Theory of operation
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