Barcode Scanner VB14A
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
Da
te of
issue
12/
2
005
34
Figure 7.1
"Step-Ladder" scanning mode
For example, the VB14-440 (800 scans/sec.) for a 25 mm high code moving at 1250
mm/s performs:
[(25/1250)
∗
800] - 2 = 14 effective scans
7.2.2
Picket-Fence mode
If scanning is parallel to the code motion, (figure 7.2 - "picket-fence" mode), the
number of effective scans is given by the following formula:
SN = [((FW-LW)/LS)
∗
SS] - 2
Where:
SN = number of effective scans
FW = reading field width (in mm)
LW = label width (in mm)
LS = label movement speed (in mm/s)
SS = scans per second
Figure 7.2
"Picket-Fence" scanning mode
Laser
beam
Direction of code
movement at LS speed
LH
VB14A
Laser
beam
Code motion
direction
at LS speed
VB14A
LW
FW