1-2. Sub Scan Direction (Document Length)
The length of the original is calculated by counting the motor pulses while the
feed sensor [A] is on. (The length is detected during scanning.)
2. Read Size Command, Auto Size Mode
If selected, this is done after document table lift/paper feed
2-1. Read Size Command
If the scanner receives a Read Size Command in ADF mode, it detects the
document size in the main scan direction as described above.
The scanner sends the width data to the host computer.
2-2. Auto Size Mode
This mode can be set with the Set Window command, which is invoked by
the driver software.
If the scanner is set in the Auto Size Mode, it detects the document size only
in the main scan direction. After this width detection, the scanner starts
scanning the detected width.
The scanning length is determined by the detected length.
3. Abort and Unload commands
These can occur at any time during the basic scanning procedure.
When the cpu receives the Abort or the Unload command during paper
transport, the scanner feeds out any original that is in the ADF.
DETAILED SECTION DESCRIPTIONS
October 9th, 1995
SCANNER PROCESS
2-14
