Datalogic Matrix 120, Справочное руководство

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MATRIX 120™ REFERENCE MANUAL
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6
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 = T
exp (max)
T
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
T
exp
SW Limit
T
exp (min)
SW/HW Limit
X
2X
Con
ve
yor
Sp
ee
d
Lim
it
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).
The
Internal Lighting parameter allows setting the operating mode of the internal lighting
system. The possible values are:

Disabled : the built-in LED array is turned off all the time. This option can be useful if using
an external lighting system;

-Very High Power Strobed : the built-in LED array is on only during the image exposure
time.
NOTE:
To avoid LED array overheating, for Power Strobed settings, the
program automatically limits the range of allowed values for the Exposure
Time parameter. Therefore, after changes to Internal Lighting , recheck
Exposure Time .