Contex Chroma 3040, Operator'S Manual

Page: 25 / 54

5-4 Original’s Insertion Slot
The Normal position (Step 0: 2mm/0.08”) is detected by a sensor in
the scanner. Auto-adjustment of the scanner’s light profile, stitching
etc. only takes place in the
Normal position . With extended media
thickness positions, the last performed auto-adjustment is stored and
utilized. This means that you should from time to time return to the
normal position, and especially when turning the scanner on, to allow it
to auto-adjust.
The
Normal position also gives the highest scanning speed. In the
extended media thickness positions, scanning speed is automatically
reduced. Heavy cardboard, foamboard etc. require lower scanning
speeds to hinder unwanted start/stops caused by the media’s low
flexibility.
Thick stiff originals will rest on top of the scanner rollers and thus raise
a small distance over the glass plate, which can lead to changes in the
stitching of images at points between the cameras (overlapping or
missing pixels). The stitching parameters can be modified in the
WIDEimage Scanner Setup dialog. The modified stitching setup is only
active in the extended media thickness positions and not in the
Normal
Position , where the standard stitching setting is used.
To modify the stitching insert your thick original in the scanner, scan
with WIDEimage and check the result in the viewer for overlapping or
missing pixels in the camera transition areas. Then adjust the value in
the WIDEimage Scanner Setup dialog. Repeat scanning and
adjustment until the effect is minimized.
The modified stitching parameters will automatically be selected when
in one of the extended media positions.
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
one of the extended media thickness positions.
Leading/trailing edge skipping can be turned off through the
WIDEimage Scanner Setup dialog.
To facilitate scanning of thick originals in the extended media
thickness positions it is important to insert the original center aligned
and to help support the original during scanning. This should be done
both at the entrance side and the exit side of the scanner.