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3.2.2 Picket-Fence Mode
If scanning is parallel to the code motion, 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
Direction of code movement
at LS speed
Laser beam
DS1500
FW
LW
Figure 24 - "Picket-Fence" Scanning Mode
For example, for a 60 mm wide code moving in a point where the reading field is 100
mm wide at a 1500 mm/s speed, the DS1500 (1200 scans per sec.), performs:
[((100-60)/1500)
*
1200] - 2 = 30 effective scans
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