Datalogic QLM500 Instruction Manual download pdf (Page 125)

READING FEATURES

115

Example:

A Matrix 410™ 600-010 using:

Internal Lighting Mode = Very High Power Strobe

Exposure Time (x10 s) = 10 (100 s)

Code Resolution (X) = 0.254 mm (10 mils)

has a maximum line speed of:

0.254 (mm) / 0.0001 (s) = 2540 mm/s

Likewise, T

exp

(max)

is the maximum Exposure Time value that can be used without blurring

for the given application line speed and code resolution. Therefore:

X / LS

(max)

= T

exp

(max)

exp

(max)

and LS

(max)

are represented in the graph below as the curved line for X (code

resolution). Values above the curve result in blurring. In practice, the application values are

somewhere below the theoretical line, (in the green area), due to environmental and other

conditions.

Line Speed

exp

SW Limit

exp (min)

SW/HW Limit

Conveyor Speed

Limit

Readable

Blurring

For example, the maximum target speed in the application is also affected by these

conditions:

Code/Background Contrast: maximum speed decreases when decreasing image

contrast (poor quality codes, reflective transparent coverings, different supports and

printing techniques).

Code Resolution: maximum speed increases when decreasing code resolution, (i.e. 2X).

There is a decrement of overlapping effects between two adjacent elements.

Tilt Angle: maximum speed decreases when increasing Tilt angle (from 0 to 45

degrees).

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Datalogic QLM500 Instruction Manual Page 125

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