NoRead, or low barcode reading performance in Keyence Readers.
The Keyence barcode readers are camera based barcode readers which have been employed in Cubiscan automated systems since Early 2019. Typically the readers do not need to be modified unless there have been changes made to physical placement or alignment, new barcode types are introduced to the system, or lighting has changed in the area that changes the label intensity (darker or lighter) and the scanner must be re-tuned to compensate for those changes. In most cases the reader performance diminishes because the label quality no longer meets quality standards due to being light or broken print, white bars due to dead pins in the Print Head (as shown below), or damaged labels that are smudged, ripped, or folded so the barcode is not readable.
The image below is a screenshot from the test results of a TruCheck barcode verifier machine. This image illustrates how a barcode is "seen" by a barcode reader. If peaks and valleys cannot be reliably decoded to represent the data contained in the code, the code is of a failing grade, and is not acceptable for use in automated systems. The codes will be rejected by the reader. Split bars caused by faulty pins in a print head fatally modify the barcode content, and it is detected as a failed code by the barcode reader. 