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
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7.1.2
Tilt Angle Improvement with ACB
ACB allows barcode reading with an increased tilt angle. The tilt angle depends upon
the code aspect ratio defined as H/L according to the table below:
7.2
Linear Code Reading
For linear code reading, the number of scans performed on the code by the VB14A
and therefore the decoding capability is influenced by the following parameters:
• "number of scans per second
• "code motion speed
• "label dimensions
• "scan direction with respect to code motion
About 5 scans during the code passage should be allowed to ensure a successful
read.
7.2.1
Step-Ladder mode
If scanning is perpendicular to the code motion direction (figure 7.1 - "step-ladder"
mode), the number of effective scans performed by the reader is given by the
following formula:
SN = [(LH/LS)
∗
SS] - 2
Where:
SN = number of effective scans
LH = label height (in mm)
LS = Label movement speed in (mm/s)
SS = number of scans per second
Aspect Ratio
H/L
Max theoretical lin-
ear tilt angle
Max practical
ACB angle
0.33
18°
30°
0.25
14°
23°
0.125
7°
11°
L
H
L
H
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