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Optical electronic sensor passes with flying colors

When this packaging machinery OEM was asked to integrate sensors that would verify accuracy in labeling, the CVS2 was part of the answer.

Pw 6541 Sick Cvs2

A major U.S. food manufacturer called on packaging machinery builder Brenton Engineering (www.brentonengineering.com) to supply secondary packaging equipment for a meat packaging line. This included a case packer, a print-and-apply labeler for ingredients, a print-and-apply labeler for bar codes, a robotic palletizing cell, and all of the necessary conveyor connections between the machines.

To verify accuracy in labeling, Brenton included in the new line two sensor devices from Sick (www.sick.com). The first sensor checks the scannability of a linear bar code that is printed by the first thermal-transfer print-and-apply machine, supplied by ID Technology (www.idtechnology.com). Should there be any defect in the code that makes it difficult to scan, a signal is sent to the PLC to reject that case.

The second sensor in the line, a Sensick CVS2, is mounted on a conveyor just downstream from the second thermal-transfer print-and-apply labeler, also from ID Technology. It’s an optical electronic sensor that checks for the presence of colors. It counts pixels of selected colors in a defined field of view and switches the output as soon as the number of pixels counted exceeds a taught-in threshold.

“It can be programmed on the fly,” says Brenton’s David Setterstrom, senior controls engineer. “That’s one of the reasons we chose it. As new label colors enter the picture at this particular plant, we have the ability to ‘teach’ the sensor these new colors.”

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