Position Scanner and Label
MS-610 Scanner User’s Manual
1-9
1–Set
up and
Inst.
6
Position Scanner and Label
Before testing the read rate, you will need to position the scanner and label
in a manner that matches as nearly as possible the actual conditions of your
application.
a. Position the scanner and label, taking care to avoid excessive tilt,
skew, or pitch.
1
Note:
The photo diode, located behind the large window on the scanner, can-
not be blocked because it receives the return signal from each scan. See
mechanical specifications on page A-2.
b. Pitch label (or scanner) slightly up or down as shown in figure 1-8 to
avoid specular reflection, the return of direct, non-diffused light.
2
Another way to avoid specular reflection is to skew the scanner
slightly relative to the label.
Note
: If this label were
moving from left to right
(or vice versa), the orien-
tation of the label, relative
to the scan beam, would
be “picket fence;” if the
label were moving from
top to bottom (or vice
versa), the orientation of
the label, relative to the
scan beam, would be
“ladder
.”
Note
: For test purposes
the label shown here is
pitched. In final installa-
tion, it is typically the fixed-mount scanner rather than the moving label that is
pitched.
For more information, see Appendix C, “Orientation,” on page A-6.
1. Maximum tilt is determined by label characteristics and number of scans required. Maximum
skew is ±40°; maximum pitch is ±50°.
2. The specular reflection zone is a narrow zone straight out from the scanner in which direct
reflected light from a label can distort the scanner’s ability to distinguish bars from spaces.
Figure 1-8 Tilt, Skew, and Pitch Axes
Tilt
axis
Pitch
axis
Bar code
label
Ske w
axis
MS-610
Scanner
