Working in PackTrack™ mode requires an encoder and a presence sensor (or equivalent
signals) to track the moving packs.
For correct functioning, the PackTrack™ operating mode requires a calibration just after the
installation of the scanners. This operation is absolutely necessary to accurately locate
barcodes on a fixed reference system.
PackTrack™ uses a right-handed reference system (right hand with thumb = X axis;
forefinger = Y axis; middle finger = Z axis) where the axis X coincides with the PS line, the Y
axis coincides with the conveyor direction and the Z axis is oriented upwards from the
conveyor (see figure below).
PackTrack™ Reference System
Figure 95 – PackTrack™ Reference System
This coordinate system is absolute for the reading station, i.e. is valid for all the scanners
independently from their position or orientation with respect to the conveyor. For this reason,
after the PackTrack™ calibration (and configuration) has been correctly performed, when a
barcode is under the beam to be read by the scanners, its position is defined by the
coordinates of its central point, independently from which scanner is reading it. This can be
verified using the Test mode in the SPY PackTrack Calibration dialog box (see par. 9.2.2).
Both Auto PackTrack Calibration using the DLAPC tool and Manual PackTrack™ Calibration
using the SPY tool can be performed in Genius™ (refer to the following paragraphs and the
Genius™ Help On-Line for details).
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