Rated Reading of dot-peened data matrix codes
Particulars in connection with the verification of dot-peened data matrix codes:
Needle embossed codes are very often used in the automotive sector. The current ISO/IEC 29158 standard for the quality inspection of directly marked codes now also takes into account the verification of these geometric codes. For this purpose, the TCL (Tilted Coaxial Lighting) structure was introduced. Basically, these codings are now checked under half the angle of the embossing needle used.
Conclusion: It is essential to select the correct rather than the right angle!
Our solution and recommendation: ”Rated reading” by means of the stationary reading systems DMR210 and DMR220
Aside from the decoding of the code content, special criteria are used for the qualification of needle-embossed codes. Among other things, it involves the review of the homogeneity of the dots, that is, the uniform depth and positional accuracy of the dots within the imaginary grid. For many applications it is additionally possible to detect the needle wear of the embosser by means of a defined reference value and to issue a timely alert for the exchange of the embossing needle.
Our engaging white paper “Data matrix code verification in the practice” is available upon request.
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Verification video for dot peened codes