Image Adjustment
182
No. Check Area Check Item Description
are the same, it is a right angle.
1. Check the
lengths between the leading edge and front end frame
line at measuring positions [A] and [B].
2. Check the lengths between the side edge and lateral frame line at
measuring positions [C] and [D].
At this time, position [D] is equivalent to position [A], when
making the fold line as shown in the above figure.
3. Check the difference between 1 and 2.
If each deviation is different, it is a parallelogram image
(non-right angle).
If the deviations are the same, it is a right angle. If there are
deviations, check the feed mechanism for errors such as skewing.
Example:
1: Right angle, correct feeding
2: Right angle, incorrect feeding (Oblique feeding)
3: Non-right angle, correct feeding (Parallelogram)
4: Non-right angle, incorrect feeding (Oblique
feeding+Parallelogram)
Linearity Check the linearity with a scale. Check in both the main scan
direction and sub scan direction.
Overlay the scale on any frame line, adjust to a position where the
frame line is not hidden, and measure the most distant position. If
difficult to check, draw an auxiliary baseline in position with no
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