Rockwell Automation 2755 Atomscan Bar Code Scanner - Manual (Page 9)

Chapter 2
AtomScan Product Family
2–3
Features of AtomScan scanners include:
•
low power consumption
•
wide field of view
•
the ability to read a wide range of bar code densities.
Note: Bar code density is the width of the narrowest bar or space.
•
high scan speed of 330 scans per second
•
small size
•
choice of raster or single line scanning
Catalog Number Scan Beam Narrow Element Range
(Nominal)
2755-L6SA Single Line
2755-L6RA Raster
5-8 mil (.12-.20 mm)
2755-L6SB Single Line
2755-L6RB Raster
8-50 mil (.20-1.27 mm)
Scan beams are projected either as a single line or as a raster pattern,
depending on the Catalog Number ordered. Both options use a 10-sided
mirror to reflect the laser beam out the scanner window.
•
The Single-Line Option projects its ten scan lines per rotation so they
follow the same path, and appear to be a single scan line.
•
The Raster Option deflects its ten scan lines up and down through 2
degrees of arc during each rotation.
Figure 2.3
Single-Line and Raster Options
Single–Line Option Raster Option
The raster type scanner is useful for reading poor quality bar code symbols.
See Chapter 3 for application details.
Overview of Scanner
Scan Beam Options