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Graze, which delivers nutritious snacks across the UK by post, customises each box based on the customer’s ratings and preferences, and optimises the freshness of each ingredient used. Its production line, however, had to process weighed

portions of the various snack products and dispense them into different format punnets. These would all fit inside the standard Graze box, which is designed to fit through a standard letter box. Due to the millions of combinations of ingredients it would require multiple positions to

suit the box configurations, and these would need to be high speed to cope with projected throughputs. Wash-down capability was essential, and all parts had to be of a smooth, hygienic, design that was free from potential dirt traps. The movement and positioning of the weighing system was another challenging area. Looking for the answer, co-founder of Graze, Neil Thompson, noticed Dunkermotoren’s Hygienic

XHA motor, running under water in a fish tank at the PPMA show. Over the following months Dunkermotoren’s engineers worked closely with Graze’s machine designers to produce an XXY gantry formation using three XHA38 series tubular linear motors. By mounting the linear motors as actuators to utilise the integrated field-replaceable polymer lubrication free slide bearings, it was possible to push the dosing head through an infinite series of positions. The ServoTube’s IP69K ingress protection rating, thanks to its non-corrosive all stainless construction, met the requirement for food-safe and no dirt-traps, while the high force output from the motors enabled Graze to meet the speed and acceleration specification with ease. The system uses an algorithm called ‘Darwin’ (Decision Algorithm Rating What Ingredient’s Next) to

determine how snack portions are sorted into punnets. With this, it is possible to get millions of different combinations of snacks placed into customised Graze boxes, labelled and sent by post. Having incorporated Dunkermotoren’s ServoTube linear motors into its lines, Graze has achieved its

production performance requirements of high line speed and increased productivity with the key benefits of fast and precise positioning. The result is less waste, reduced maintenance and lower costs, simplified set-up, lower noise levels and, ultimately, increased profitability.

Dunkermotoren T: 02380 733509 Enter 215


New from ACS Motion Control is a control module that can manage networks with up to 32 axes and thousands of I/Os. The SPiiPlusCMHV is a line of EtherCAT

master motion controllers with one/two axes of integrated drives that operate from 3-phase 230Vac to 480Vac, or 320Vdc to 670Vdc. It offers currents from 5/10A (continuous/peak) to 20/60A (continuous/peak). Each control

module consists of a motion controller and EtherCAT master, one or two servo drives, and a power supply. According to

the company, the module is

suitable for motion centric industrial applications, medical scanners, new generations of large FPD positioning tables, etc.

ACS Motion Control Enter 217


New from Delta Electronics is the PAC MH-1 Series programmable automation controller (PAC). These feature an EtherCAT master port which allows for up to 4kHz of synchronous cycle time for multi-axis control and automation (up to 64 axes of control); and the built-in DMCNET master enables a 12 multi-axis motion control. It connects a maximum of 100 units of EtherCAT slave modules or 24 units of DMCNET slave modules. Linear, arc, helical and high-speed continuous interpolation can easily be implemented. Additional features include a 1.2 GHz to 2.7 GHz Dual-code processor, an operating temperature range from 0˚C to 50˚C, stable storage, and a cable-less and fan-less design for increased reliability and reduce power consumption. The MH1 Series can be integrated with Delta’s automation system solutions like the servo system

ASDA Series and ECMA Series servo motors. Delta Electronics Europe Enter 218


The new Parker Automation Controller (PAC) combines machine logic, advanced real-time motion control, and visualization into one performance-driven solution. Said to be suitable for the most

demanding projects, the PAC features EtherCAT communication for motion and I/O plus the Parker Automation Manager (IDE, Integrated Development Environment) for application development. This package offers a single, intuitive environment for development with industry standard programming, machine-to-machine communication, and network connectivity to provide real-time information where and when it’s needed, the company explains. It also comes standard with a variety of onboard communication protocols.

Parker Hannifin

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Despite weighing as little as 18g, the rugged Gold Twitter servo drives from Motion Control Products are capable of delivering up to 4,000W of qualitative power. The drives can be

mounted directly on the motor or moving mechanical load, enabling high servo performance with substantial cost savings in hardware and cabling, the company explains. These run optimally on all types of servo motors and can operate in current, velocity and advanced position control modes. They also offer advanced

servo capabilities and support for EtherCAT and CANopen fieldbus technologies. These are also capable of ultra-high

current output; support any type of feedback sensor in single, dual and gantry loop configurations; and have a powerful internal braking shunt resistor and a multi extended I/O interface. In addition, they feature Elmo’s proprietary FASST (Fast and Soft Switching Technology), resulting in

greater than 99% efficiency and negligible EMI.

Motion Control Products


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