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Symbol is Parallel to Conveyor Movement
With the symbol bars parallel to the conveyor belt direction (ladder presentation) the
relationship is:
V = (R x H) / N
where:
V = Velocity of the conveyor (inches/second)
R = Scan Rate of scanner (see technical specifications)
H = Symbol height
N = Number of scans over symbol (minimum of 10 scans)
Figure 2-10. Symbol Parallel To Conveyor Movement
Example
Use the previous formula to calculate the number of scans for a specific bar code, scanner,
and conveyor speed; a minimum of 10 scans per symbol is recommended.
R = 640 scans/sec
H = 60 mil
N = 10 scans
V = (640 x .060) / 10 = 3.84 in./sec
Scan Beam
Installation
2-15
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