Installation manual

DS2400N REFERENCE MANUAL

7.2 LINEAR CODE READING

The number of scans performed on the code by the DS2400N and therefore the decoding

capability is influenced by the following parameters:

 number of scans per second

 code motion speed

 label dimensions

 scan direction with respect to code motion

At least 5 scans during the code passage should be allowed to ensure a successful read.

7.2.1 Step-Ladder Mode

If scanning is perpendicular to the code motion direction (Figure 103), the number of effective

scans perfor

med 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

Figure 103 - "Step-Ladder" Scanning Mode

For example, the DS2400N (800 scans/sec.) for a 25 mm high code moving at 1250 mm/s

performs:

[(25/1250)

800] - 2 = 14 effective scans.

Direction of code

movement at LS speed

Laser beam

DS2400N