Nyquist – New TubeScan QLink workflow

Tubescan system integrated in a printing press (Source: Nyquist)

Print inspection workflows in label production and flexible packaging have been around for quite a few years. The basic idea remains the same: 100% print inspection on the press and utilisation of the inspection protocol (rollmap) for defect placement on the rewinder. With the introduction of QLink, Nyquist Systems aims to enable printers to reduce their costs and improve product quality.

Workflow of Nyquist’s workflow inspection system QLink (Source: Nyquist)


Written by Robert Heichele, Dr Stephan Krebs

The company’s new feature is the real-time counter of QLink: While the TubeScan is scanning for defects on the printing press, the printer uses the touch screen of the QLink editor to classify the defects as „relevant“ or „not relevant“. As the printer is making his choices, the information is immediately considered in the net count of the inspected goods. Larger defect areas, like missing ink, are being defined as „waste zones“ and can be processed on the rewinder as a whole. This innovative feature is a huge advantage when it comes to production costs. At any given time, the printer knows the net count and can run his press up to the exact production amount required.

90% smaller file size

In addition, the compression of inspection data has been completely re-designed. With Nyquist QLink, the file size can be 90% smaller, compared to usual rollmap files with pictures in jpg and bmp file format. Transfer of the inspection protocol within the customer’s network is now faster and less data storage hardware is required.

The defect placement and defect removal within the workflow is controlled by a second camera system on the rewinder. In this regard, waste reduction is also an issue: Whereas common workflow systems utilise ultrasonic and contrast sensors to synchronise inspection protocol with the running web, Nyquist QLink features synchronisation via a camera.


Compared to other workflow inspection systems on the market, the QLink workflow is very cost-effective. Depending on the job TubeScans can either be used in the QLink workflow or individually as stand-alone-units. On the rewinder, for example, it can also be used as a web video, for missing label detection or as a 100% print inspection system for rolls that have not been inspected on the press. Different types of illumination for UV detection or clear-on-clear / clear-on-paper applications are available. It is not mandatory to do the editing of the defect protocol on the press.

The QLink editor can also be installed in a separate quality assurance area or in the production manager’s office.

Rollmap editing

Finally, the operator of the rewinder may also take care of the rollmap editing right before converting and finishing. The new QLink workflow offers a solution for packaging and printing companies independent  of size and structure.

The worldwide sales of the Nyquist TubeScan product portfolio is taken care of by BST eltromat International. Nyquist Systems focuses on research, development and production of their inspection systems.

At Labelexpo Europe 2017 the QLink workflow will be presented in Brussels for the first time. Nyquist Systems will provide live demonstrations of the QLink workflow in hall 7, stand B38. BST eltromat International in hall 6, stand 6E60.

This article was first published in the August issue of NarrowWebTech, issue 3-2017, available as digital or printed version in our online shop!

Rosina Obermayer

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