Rockwell Automation 2755 AtomScan Bar Code Reader - Manual (Page 21)

Chapter
3
Publication 2755-6.9
Designing Your Scanner System
This chapter provides the information needed to set up a scanner
system correctly. Items include:
•
setup goals
•
symbol height and length
•
symbol quality
•
symbol orientation
•
tilt, pitch, and skew
•
determining read range
•
calculating the number of scans
Each application must be evaluated carefully. Successful bar code
scanning begins with quality bar code symbols and the correct
number, type, and location of readers, decoders, and package
sensors. Refer to the following when designing your scanner system.
•
Before setting up the system, calculate the expected number of
scans per symbol. Make sure the application has the number of
scans it needs. If necessary, adjust the symbol speed and/or the
distance between bar-coded packages.
•
Position the reader at a distance from the symbol that is within
the range specified. A read rate test should be made to verify the
range, and also to ensure optimum scanning and decoding.
•
Avoid aiming the reader perpendicular to the symbol, to avoid
directly reflected laser light.
•
If a package sensor is used, position it so it can sense the package
before the symbol reaches the scan area.
Note: Make sure that the scan beam does not hit the sensor’s
reflector; the resulting glare can blind the reader temporarily.
Setup Goals