2.2. SCANNER PROCESS
2.2.1. Book Mode
Basic Scanning Procedure
When the scan command is received from the host computer, the scanner
starts scanning as explained in the following steps.
1. Initialization
The scanner checks the home position, scanner cover, and memory. If an
error is detected, the scanner motor will stop.
The scanner scans the white plate [A] on the underside of the ADF exposure
cover to perform the shading function.
2. Image Scanning
There are two rectangular black marks [A] and [B] (2 x 2 mm) for scanner
position fine adjustment. The mark [A] is not used but the mark [B] is used for
moving the carriage to the exact scan start position. At the start of scanning,
the scanner moves from the scanner home position, and looks for the mark.
The machine uses the black mark to move to the exact scan start position,
which is nearby.
[C]
[B]
[A]
Home Position
Sensor
View from the right side of
the machine
[B]: Home Position
[C]: Book Mode
Standard Position
G404D509.wmf
[A]
[B]
g404d533.wmf
Det
a
il
ed
Descriptions
October 9th, 1995
DETAILED SECTION DESCRIPTIONS
SCANNER PROCESS
2-5
