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Mixed Original-Length Mode
Width detection: Same as for normal mode
Length detection: Done for each sheet
As a result, scanning is slower if the user selects
mixed size mode
To detect length, the machine counts transport
motor pulses from registration-sensor-on until
registration-sensor-off
Slide 277
Normally, in mixed original-length mode, original length is detected as shown below:
The width is detected with the same procedure that is used when all originals are
the same size.
The machine keeps an area in memory that is sufficient for an original of the
detected width and 432 mm length.
Printing is done after length detection, and only the part of the memory that
contains data up to the detected original length is printed.
But, if some functions are selected (for example, Auto Reduce/Enlarge), the length must
be detected before image scanning starts. Because of this, the machine must measure
the length before scanning.
It must also make sure that the originals are in the correct sequence before
scanning. Because of this, the 3 steps in the manual are done.
If the original is duplex, the original is inverted again after scanning the first side.
Then the second side is scanned, and the paper is fed out.
Why must the machine measure length first when we use Auto Reduce/Enlarge,
Centering, and other functions?
With these functions, the machine must know the length of the original accurately.
For example, with centering, the image is centered on the copy paper. This cannot
be done if the machine does not know the length of the original accurately.
Also, with Auto Reduce/Enlarge, the size of the original's image is decreased to fit
on the copy paper. This cannot be done if the machine does not know the length of
the original accurately.
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Di-C1.5 Training
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