November 29, 1999
ADF/SCANNER
2-1
Detailed
Descriptions
2. DETAILED SECTION DESCRIPTIONS
2.1 ADF/SCANNER
2.1.1 OVERVIEW
1. Document
detection
•
The machine detects when a document is placed in the ADF by monitoring
the document sensor (S1).
•
From the combined output of the document (S1), B4 width, and A3 width
sensors, the ADF can detect three possible widths: A4, B4, and A3.
2. Document
pick-up
•
The vertical movement of the pick-up roller [A] is controlled by a spring
clutch.
•
FRR type separation mechanism, using the reverse roller [B].
•
The pick-up roller gear
prevents excessive load from being placed on the
scanner motor.
•
The spring clutch of the feed roller prevents excessive load from being
placed on the scanner motor.
3. Document
feed
•
The scanner motor drives all the document feed rollers.
•
MDF [C] (Manual Document Feeder)
4. Returning to ready status
•
The pick-up roller is lifted by reverse rotation of the scanner motor.
5. Image
Scanning
(CCD)
•
Maximum scanning width: A3
•
Stamp function
6. Jam
detection
•
Monitoring of all sensors
H306D516.WMF
[A]
[B]
[C]
