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.
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).
T
exp
(min)
is the minimum Exposure Time value obtainable for the specific application. It can
be evaluated in static reading conditions and depends on the Matrix reader model selected
for the application (internal lighting system, optical lens, reading distance) and on any
external lighting system. It may also depend on code printing quality, and reader position.
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;
Always ON: the built-in LED array is turned on all the time at the lowest power level. This
option is useful if the LED-array blinking (Strobed operating mode) disturbs the operator.
-Power Strobed: the built-in LED array is on only during the image exposure time.
Different Power Strobed lighting levels can be set.
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.
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