Peripheral LED Group
Left Sector Top Sector Right Sector Bottom Sector
Diffused Red Illuminator
Product Reference Guide 193
Via software each single sector can be turned on, however it is NOT possible to
simultaneously turn on sectors belonging to the separate LED Groups -
Peripheral and Central. Despite this restriction, thirty different combinations of
ON/OFF lighting configurations can be obtained.
By enabling multiple Image Settings, each having a different ON/OFF LED
comb
ination, different consecutive images can be acquired, changing the
activation of the eight LED sectors. This feature is particularly effective for
reading codes printed/marked on reflective surfaces, by sequentially turning OFF
the single LED sectors.
Examples for DPM Applications
In the example below, a Data Matrix code etched onto a PCB (reflective surface)
must be read.
With all four LED sectors enabled (Example A), the code is not readable due to
t
he LED reflections on the code surface. With different Image Settings in which
the Right sector is turned off (removed from the parameter combination -
Example B), the code is illuminated by the other LED sectors without the
reflections on the code surface.
Example A
INCORRECT illumination
Example B
GOOD illumination
Furthermore, the use of the Diffused Red Illuminator is really effective in direct
part marking applications (DPM), where linear machining flaws are present on
the part surfaces. In these cases, an image of the code can be obtained having a
To Next Page
Loading...
