Rockwell Automation 2755 Atomscan Bar Code Scanner - Manual (Page 12)

A–B
3
Chapter
3–1
Designing the System
This chapter provides information needed to set up the scanner correctly,
including:
•
Bar code symbols
•
Symbol orientation
•
Selecting the appropriate AtomScan scanner for your application
Each application must be evaluated carefully. Successful bar code scanning
begins with quality bar code symbols, and the correct number, type, and
location of scanners, decoders, and object sensors. Also:
•
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
objects.
•
Position the scanner at a distance from the symbol that is within the range
specified (see Table 3.A). A read rate test (see the Enhanced Decoder
user’s manual, in which read rate is called “decoder performance
indicator”) should be made to verify the range, and also to ensure
optimum scanning and decoding.
•
Avoid aiming the scanner perpendicular to the symbol, to avoid directly
reflected laser light.
•
If a package sensor is used, position it so it can sense the object 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 scanner temporarily.
Chapter Objectives
Setup Goals