Reading Features; Step Ladder Mode - Datalogic DS2200 Installation Manua

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DS2200

3 READING FEATURES

The number of scans performed on the code by the DS2200 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.

If scanning is perpendicular to the code motion direction (Figure 3.1 - "step

ladder" mode), the number of effective scans performed by the reader is given by

the following formula:

These symbols signify:

SN =

LH =

LS =

SS =

For example, the DS2200 (500 scans/sec.) for a 25 mm high code moving at

500 mm/s performs:

14 - Reading Features

DS2200

Figure 3.1 - "Step Ladder" scanning mode

SN = [(LH/LS) * SS] - 2

number of effective scans

label height (in mm)

label movement speed (in mm/s)

number of scans per second

[(25/500) * 500] - 2 = 23 effective scans.

Code motion direction

at LS speed

Laser beam

DATALOGIC

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