Pepperl+Fuchs Visolux VB12, Manual, Page: 24 / 32

Barcode Scanner VB12
Reading features
Subject to reasonable modifications due to technical advances. Copyright Fuchs, Printed in Germany
Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 7 79 90 91 • Internet http://www.pepperl-fuchs.com
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6.2 Picket fence mode
Figure 6.2 "Picket fence" scanning mode
If scanning is parallel to the code motion, (Figure 6.2 - "picket-fence" mode), the
number of effective scans is given by:
SN = [((FW-LW)/LS) x SS] - 2.
These symbols signify:
SN = number of effective scans
FW = reading field width (in mm)
LW = label width (in mm)
LS = label movement speed (in mm/s)
SS = number of scans per second
For example, for a 50 mm wide code moving in a point where the reading field is
180 mm wide at a 1300 mm/s speed, the VB12 (350 scans per sec.) performs:
[((180-50)/1300) x 350] - 2 = 33 scans.
Code motion direction
at LS speed
Laser beam