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Optical Mark Recognition (OMR) • 5
5-17SV40221 Rev. A
Defining the Clear Zone
When requested by the machine, measure and enter the distance
(A) from the top edge of the sheet to the point after the printed matter
where you wish the machine to START scanning.
Again, when requested by the machine, measure and enter the
distance (B) from the start point just set, to the point you wish the
machine to STOP scanning. This is called the Clear Zone.
Note that setting the Clear Zone closer to the beginning and end
of the OMR marks decreases the possibility of any poor print or
imperfections on the material being interpreted as OMR marks.
Conversely, setting the Clear Zone too close to the beginning
and end of the OMR marks could cause problems if the position
(registration) of the printing on the material varies. A good guide is
to limit the Clear Zone, but always allow at least 3/4” (20mm) before
and after the OMR marks.
A
B
Grey area
indicates
printed matter
on material
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SV40221 Rev A book.indb 5-17 9/14/2004 5:51:20 PM