Reading and verifying moving codes can sometimes be problematic, particularly if they are fast moving, inverted, reflected or even, as happens with data matrix codes, presented as a kind of hole pattern, instead of a square shape.
Leuze addresses these issues with its new LSIS 422i smart camera which reads dot-peened, laser-etched and printed codes. It is characterised by motor driven focus adjustment, uniform illumination of free-form surfaces and connection technology suitable for industry. The code reader can be configured via a web browser due to its eight freely configurable I/O ports, RS232 interface and Ethernet interface. It features a display for diagnostics and status, as well as standalone operation.
The camera reads up to 99 barcodes per image in any format. It captures only one image, allowing quick reading of codes on swiftly moving parts. This is due to a short exposure time which can be set to a minimum of 54 μs. Adjustable parameters can also optimise performance. For instance, pre-filters with certain code features can be specified to speed up the reading process. The step size of the search for 1D codes can also be increased. In addition, this sensor allows the reading of inverted, two-dimensional codes, setting the reading mode to ‘fast’ for good quality codes or ‘robust’ for directly marked codes.
A further option is to determine and evaluate quality parameters of the read code, allowing code quality to be checked immediately after printing to ensure readability. The quality criteria can be customised by the end user and the value below which a warning is issued can also be defined. The reader will also produce a message if the code read does not conform to the specification.
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