READING FEATURES

3

 

3.2.1Step-Ladder Mode

If scanning is perpendicular to the code motion direction (Figure 23), the number of effective scans performed by the reader is given by the following formula:

SN = [(LH/LS) * SS] – 2

Where: SN

= number of effective scans

 

LH

= label height (in mm)

 

LS

= label movement speed

 

 

in (mm/s)

 

SS

= number of scans per second

 

 

Direction of code

 

 

movement at LS speed

DS1500

 

LH

 

 

 

 

Laser beam

Figure 23 - "Step-Ladder" Scanning Mode

For example, the DS1500 (1200 scans/sec.) for a 20 mm high code moving at 1200 mm/s performs:

[(20/1200) * 1200] - 2 = 18 effective scans.

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