Take into consideration that when using Multicolored DPM Central LED Group to illuminate surfaces where linear machining
flaws are present, the well-lighted area depends on the direction of the machining flaws with respect to the illuminator's
LED sectors, but independent of the reading distance.
This characteristic fixes the upper limit of the code dimensions compatible with the use of the Multicolored DPM. In reality,
it is an actual limit of the usable part of the field of view. This limit must be taken into consideration during the feasibility
analysis of the solution, including the eventual positioning variation of the codes with respect to the center of the reader's
field of view.
The arrangement of the LED sectors allows obtaining a well-lighted area even when the direction of the machining flaws is
changed.
Refer to the following images for the dimension of lighted area illuminated by the different LED groups.
Figure 176. Color Photo of Code
32 mm
25 mm
Figure 177. Multicolored DPM Peripheral LED
Group
26 mm
Figure 178. Multicolored DPM Central LED Group
13.2.3
ABR 7000
Applications
The following examples show the use of the illuminator models described in this manual.
Linear Machining Flaws
To better understand the advantages of using the Multicolored DPM in DPM applications where linear machining flaws are
present on the part surfaces, see the example below. In the example, Data Matrix codes are marked using dot peening onto
metal surfaces having evident machining flaws previously produced by machine tools.
Dot Peening on a Flat Surface with Vertical Streak-like Processing Flaws Produced by Machining Tools
Figure 179. Color Photo of Code
ABR 7000 Series Barcode Reader
134
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