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READING FEATURES
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3.2.1 Step-Ladder Mode
If scanning is perpendicular to the code motion direction (Figure 23), 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
Direction of code
movement at LS speed
LH
DS1500
Laser beam
Figure 23 - "Step-Ladder" Scanning Mode
For example, the DS1500 (1200 scans/sec.) for a 20 mm high code moving at 1200
mm/s performs:
[(20/1200)
*
1200] - 2 = 18 effective scans.
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