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Barcode Verifier Calibration and Use

Ron Rompen

Trusted Information Resource
#1
Is anyone else in the group familiar with barcode verifiers? I was recently directed to purchase one for our company (to supplement our barcode scanners) but nobody really thought out what we were going to use it for, or how. I have some ideas, and wanted to run them past someone who has already gone through this. Anyone?
 
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Ron Rompen

Trusted Information Resource
#3
Thanks Al. I know what they are used for (grin), but I am looking at developing a useful approach in utilizing it. Just to give a broad outline of my thought process:
We have 7 laser markers, which mark a variety of parts with a 2D matrix (AIM DPM standard). After marking, each part is immediately graded (using a standalone grading camera) to ensure it meets customer requirement (Grade C or better)
My thought is to use the verifier to validate the grading camera values. If I sample (for example) one part from each grading camera each week, and compare the results (grading camera vs verifier) I can demonstrate that my grading camera does (or does not) accurately assess the grade of a given 2D matrix.
In addition, if I track the various reported values (as read by the verifier) I can detect shifts/degredation in the overall quality of the 2D matrix off a given camera.
Has anyone had any experience in the above, and if so, did it yield any useful information? Is there a 'better way' to approach this?
 

Al Rosen

Staff member
Super Moderator
#4
Ron, in essence the verifier will be your master standard and the cameras will be the working standards. I don't know what your volume is, but "verifying" each camera each week seems a bit much. I guess after you have some history, you can reduce the frequency.
 

Mike S.

Happy to be Alive
Trusted Information Resource
#5
I'm only familiar with a "verifier" being the device that gives a letter grade to the 2D UID matrix after it is printed, looking at parameters (going from memory here) like fixed pattern damage, contrast, etc.

The other device was a "reader" that would just output the HRI from the MRI but not give a grade.

The "camera" as a 3rd type of device I am not familiar with.
 

greif

Involved In Discussions
#6
Your approach is good- you will want to adjust the frequency after you have done it a few weeks (may need less, if all is stable). You will find certain parameters are the tight ones. Contrast is a biggie for both 2D and 1D codes.
If you need a traceable barcode standard (traceable grading of various 1D and 2D symbols), they are available at appliedimage.com.
 
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