Scanning Documents
User Manual H12 / SCAMAX® 8x1 - Version 2019.12
5.5.
Scan Plane
Directly behind the feeder, the Scan Plane begins
(see chapter
), in which the documents pass
through the Document Input Detection and Double Feed Detection
(see chapter
), as well as
the PreScan Print Area
) before first the
Front Scan Area and then the Rear Scan Area is reached.
Each Scan Area consists of a Scan Module with LED Illu-
mination Unit and an associated Scan Background on
the opposite side of the Scan Plane.
Both Scan Module and -Background are covered
dust-protected with a high quality and scratch-resisitant
glass guide. In the Front and Rear Scan Modules respec-
tively the associated LED Illumination Unit can be seen,
which ensures uniform illumination of the Scan surface.
5.5.1.
Scan Background
Right of the Scan Background a metal plate is located to
change the Scan Background from black to white (
see
also chapter
). This is used for processing foils
and transparencies, but can also be useful for very thin
papers. In the standard case (
black Scan Background
) the
plate at the Scan Background is withdrawn. By pushing
this plate inwards, the scan background is changed to
white.
5.5.2.
Paper Passage Setting
With the green dials which are located at both sides of
the Scan Background the Paper Passage Setting, i.e. the
distance between the glass guides of the Scan Module
and the Scan Background can be varied in three stages.
The dials are labelled with numbers from 1 to 3, and
when turned, they will latch into one of these three
positions. The current setting is indicated by the num-
ber pointing inwards, towards the scan background.
The three numbers are representing the possible passage widths: 1 = approx. 1 mm
(best quality),
2
= approx. 2 mm
(balanced)
and 3 = approx. 3 mm
(best flexibility).
This suggests that the close position
also generates the best image quality, whilst with the open position it offers the highest flexibility
with respect to paper thickness and even stapled documents can be processed. The middle position
is a balanced setting with very good quality and flexibility. In order to ensure correct operation, all
four dials need to be set to the same number.
If the paper passage setting is too high, in relation to the documents processed,
slight distortion within the resulting images may occur. This is caused by varying
distances between the scan plane and the documents passing by. In the example
shown to the left, part of an image is shown, which was created by scanning 80g/m²
paper with a paper passage setting of 3. The red line was added later and illustrates
the resulting distortion along the left edge of the table.
Front Scan Area
Front Scan Area
