Scanning Thick Media
6-5
6.4 When Scanning in Thick Media Positions
On All Scanners
For Auto-adjustment – return to the Normal position.
The scanner employs an automatic self-adjustment procedure (light profile, stitching etc.) that
can only auto-activate when the scanner is in the
Normal
position. With prolonged scanning in
extended thickness settings, you should from time to time return the scanner to its
Normal
position to allow it to self-adjust. This will ensure refreshed self-adjustment and optimal
performance of your scanner. Make a habit of always setting the scanner in the
Normal
position
when shutting down, so it can auto-adjust the next time you turn it ON
NOTE:
The scanner runs at its optimal speed in the
Normal
position. To allow stable drive
handling, scanning speed is automatically reduced when the scanner is in the extended
thickness positions.
Modifying Stitching Parameters
Thick stiff originals will rest on top of the scanner rollers and thus raise a small distance over the
glass-plate. This can lead to irregularities in the stitching of images at points between the
cameras (overlapping pixels). In such cases, the stitching parameters will need to be modified.
You can modify stitching parameters through your scanning application.
1. Insert your thick original in the scanner and scan the image using your scanning
application.
2. Check the result in the viewer for overlapping or missing pixels in the camera transition
areas.
3. Adjust the stitching values in the application’s scanner setup dialogs.
4. Repeat scanning and adjustment until the effect is minimized.
Treating Edge Distortion
Scanning thick originals can give distortions when the front edge meets the exit rollers or the
trailing edge leaves the entry rollers. To omit this, the leading and trailing edges are by default
skipped when in an extended thickness position.
Leading/trailing edge skipping can be turned off through the scanning application’s setup
dialogs.
Supporting Thick Originals
Center-loading is the best method for loading thick originals. Its also important to help support
the original during scanning - both at the entrance side and the exit side of the scanner.
Specially designed support tables can be attached to the back of the scanner. Such a table is
recommended for high volume thick media scanning. Ask your local dealer for purchase
information.
Summary of Contents for GS67D
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