Quality checks of product QR codes

Miner

Forum Moderator
Staff member
Admin
#1
My company plans to start printing QR Codes on the visible face of our products. The code would direct the scanner to a user manual, product certification, etc. Some codes would be printed onto existing labels, some would be laser etched into the product housing (plastic), some would be inked directly onto the product housing. The technology used for printing would be the same as for currently labeling.

I have researched the following:
  • Verify that the encoded information is correct (does it say what you think it says)
  • Scan the QR code under different lighting conditions
  • Scan it using multiple devices (old and new)
  • Scan it at the same distance from which users will scan it
  • Data matrix code quality (IEC 15416):
    • Symbol contrast
    • Cell size
    • Axial Non-uniformity
    • Unused error correction
For those of you that already do this, are there additional quality checks that you perform above and beyond those checks that you would perform for a traditional product identification label?
 
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John Predmore

Quite Involved in Discussions
#2
A few years ago I was responsible for labeling a product with code 39 barcodes. Our customer required our barcodes be scored by a verificator, which gives a letter score rating contrast and readability of barcodes. A quick search today found there are similar devices for 2D codes. I learned a bunch by reading the 2D Code Quality GuideBook from KEYENCE. I have no experience or involvement with KEYENCE readers, but this company is a market leader in sensor products.
 

Ninja

Looking for Reality
Trusted Information Resource
#3
Yes, Keyence is a great resource for this...

Consider also which of the bullet points you list belong in Design Control only (Development), and which could easily slip into normal production for every part...

Different lighting, different distances...DC.
Does it scan and send me to the right place? That's easily on every part...perhaps during the packing or shipping process for part or qty counting vs. packing list.

HTH
 
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