DS2100N REFERENCE MANUAL
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7
7.2.2 Picket-Fence Mode
If scanning is parallel to the code motion, (Figure 106), 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 106 - "Picket-Fence" Scanning Mode
For example, for a 60 mm wide code moving in a point where the reading field is 160 mm
wide at a 1500 mm/s speed, the DS2100N (500 scans per sec.), performs:
[((160-60)/1500)
*
500] - 2 = 31 effective scans
Direction of code movement
at LS speed
Laser beam
DS2100N
FW
LW
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