Rockwell-automation 2755 Atomscan Bar Code Scanner Bedienungsanleitung PDF herunterladen (Seite 18)

Chapter 3

Designing the System

3–7

Figure 3.5

Correct Setup of Scanner

20_-30_

Scanner between 20_ and 30_

above or below the symbol

When using “A” range scanners to read symbols with high paper noise,

increasing the skew to 30° may enhance performance.

To select the correct AtomScan scanner for your application, you must

measure:

• the distance between the scanner and the symbol (which must be within

the Read Range)

• the apparent Narrow Element width. This equals the actual measured

Narrow Element width if the symbol is not pitched. See the section later

in this chapter, Compensating for Pitched Symbols.

• the bar code symbol’s length and height (see Figure 3.1)

• the speed at which the symbol will be travelling

Selecting the Correct

AtomScan Scanner

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Rockwell-automation 2755 Atomscan Bar Code Scanner Bedienungsanleitung Seite 18