Rockwell Automation 2755 AdaptaScan Bar Code Readers - Manual (Page 23)

Overview 1–15
Scanning Parameters
You can configure the Reader for linear or raster scanning. Setup
dialogs determine when and how the laser scans a bar code symbol.
Raster Setup Linear Setup
Focus Options
The Reader has a variable focus distance. The software supports
manual, preset, and focus options.
•
Manual
Manual adjustment of the read range allows you to fine-tune the
focus setting for a maximum read percentage.
•
Preset
Four preset read ranges (A, B, C, C+) correspond approximately
to bar code scanners (Catalog No. 2755-LD4, -LD8), allowing for
easy replacement of these scanners. See Chapter 2 for read
ranges.
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AutoFocus
The Reader scans for a label from the nearest to the farthest focal
distance. The number of reads at each distance is determined and
the focal distance is set halfway between the nearest and farthest
focal distance where 100% valid reads occur. The dialog shows
the autofocus function graphically.
Focus Setting