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DS8100A
4
The decoder will be able to read the label with a tilt angle between
+
α max and - α max as shown in the following figure:
Conveyor
Laser Beam
No Read
No Read
-
α
+
α
0°
O
K
O
K
O
K
O
K
O
K
No Read
Figure 62 – Reading Zones with α Max
The formulas to calculate
α maximum depend on various parameters such as: label height,
number of scans per second, code motion speed, etc. Minimum label heights at different
conveyor speeds are given in the tables in par. 4.3.1, depending on standard
α values of 45°
and 30°.
4.2 PACKTRACK
ackTrack™ is a patented operating mode for Datalogic Omni-Directional Reading Stations
used to read and correctly assign codes read on different packs when placed in the scanner
Reading Area at the same time.
In fact, in the following example, the codes of two or more consecutive packs are found at
the same time in the scanner reading area. Therefore, the condition occurs where, in the
sequence of the two packs, the code of the second pack is read first, just before the code of
the previous pack. A system without PackTrack™ would assign the code of the second pack
to first pack and vice versa, thus causing a gross error in sortation.
™
P
Figure 63 – PackTrack™ System Layout
Working in PackTrack™ mode requires the presence of an encoder and a presence sensor
to track the moving packs.
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