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Digital Printing


packaging manufacturers, Durham Box, have been benefitting from the firm’s increased print capabilities. One such business being Newcastle-based tea retailer, Love Leaf Tea, who needed a presentation box for their loose leaf tea infusions. Looking for an order quantity of 850 and requiring follow-on flexibility to change print on future runs without incurring plate costs, digital was the perfect solution for the online brand. To create their packaging, a standard die-cut 0427 postal box was used, which suits shallow smaller products such as packs and small tea caddies as in this case. An internal fitting was designed for the box to hold the various components. The box thereafter was printed 4-colour CMYK inside and


Digital solution ideal for Love Leaf Tea F


ollowing their new digital press investment, customers of corrugated


Tea’s founder, Melanie Leronymides. “The folk at Durham Box are great to work with and the use of digital print in this case is perfect for the application and the packaging looks so cool.” Durham Box’s digital capability is based on a Wonderjet WD200 is a 2,000mm, single pass, high speed digital printer with dryer and coater inline. It can handle a wide variety of corrugated sheets, from the thinnest microflute, through to standard doublewall board. It prints in the standard CMYK range, using water-based dye inks. This, together with a Zünd BHS150 digital cutter


one-colour black outside with sealer varnish to the outside print. “The presentation box is for a


subscription box and a gift box we are in the process of setting up,” says Love Leaf


has enables the firm to service the needs of a wide range of customers from a number of different sectors.


durhambox.co.uk/digital


Reinventing the lightgrid as a light chain S


ICK has reinvented the lightgrid as a versatile “light chain” of cascading photoelectric sensors.


The FlexChain detection system is a completely new way of configuring light grids that offers unprecedented freedom for automated print and packaging machinery applications. With SICK FlexChain up to 60 sensors can be daisy-chained together in a single line topology and connected to a compact FlexChain host. The cost-saving ‘mix and match’ concept allows engineers to build their own light grids via a web selection tool and to individually space through- beam, reflex and proximity sensors as needed, with minimal cabling and installation. It is easy to add more sensors at a later stage. Push-button commissioning is quick and easy via the FlexChain host and using individual sensors enables a high level of diagnostic information to be available at all times, with maximum detection reliability. “Where conventional light grids are


limited by fixed send- and receive profiles, and multiple sensor arrays require individual cabling and risk cross-talk interference if positioned too close together, the SICK FlexChain now offers the best of both worlds,” explains David Hannaby, SICK’s UK product manager for presence detection. “In addition, a FlexChain can be over 60 metres long - which is very big for a lightgrid.


18 April 2019 “FlexChain is a new way of thinking that


offers quicker paybacks for common automated light grid applications in printing, converting and papermaking, such as width classification and leading edge detection in continuous or sheet material feeding, or for materials handling and pallet loading checks.” The SICK FlexChain system offers the benefits of lightgrid detection with sequential triggering of every beam, but, unlike a conventional lightgrid, positioning the sensors individually makes it possible to vary the beam separation to suit the application. Measuring ranges and detection zones of different widths can be set up for each task. The FlexChain system uses modified sensors from SICK’s G6 family that are fitted with a special ASIC. Cross talk between sensors is eliminated thanks to SICK’s lightgrid technology. Maximum availability is assured irrespective of how the sensors are arranged and how close to, or far away from, each other they are.


connected sensors are identified, addressed, and taught-in automatically at the touch of a button via the FlexChain host. It is also possible to configure application-specific logic in the host and to customise parameterisation via USB or SICK’s SOPAS software tools. A key advantage of configuring a light


grid with individual sensors is that the data from each one can be sent for evaluation in the FlexChain host or forwarded to the PLC at any time via IO-Link. Detailed information like “quality of run” values, the status of each beam, or height and width measurement values is available at all times. A wide range of detailed sensor and system feedback enables predictive maintenance and avoids unnecessary plant failures and downtime. sick.co.uk


convertermag.com


The sensors are cabled as a cascade using pigtails in three varying lengths, so cabling costs are much lower than if they were wired individually and installation time is minimised. It is simple to integrate the application-specific sensors needed into both new or existing plant and machinery. The compact FlexChain host supplies the sensors with power and provides the system communication with three or six digital outputs, a CANopen fieldbus interface, an RS-485 interface, and an IO-Link connection for flexible integration into the machine or plant’s control environment. Commissioning is quick and easy, as all


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