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FEATURE MACHINE BUILDING, FRAMEWORKS & SAFETY


MOM MAKES MACHINE COMMISSIONING EASY


As a manufacturer of modular metalworking machines for use worldwide,


Hermle has specified Murrelektronik’s Cube67 modular IO system with Machine Option Management (MOM). Alexander Hornauer explains why


But, because the Cube67 system comes with Machine Option Management (MOM), Hermle’s commissioning process is uniform, regardless of the options chosen. With MOM, the project planning for the machining centre’s hardware and software is done virtually on the basis of a standardised full extension. During commissioning, the machines are then configured according to their actual equipment. Parts of the finished machine are often


Cube67 on the Hermle machining centre B


ased in Gosheim, Germany, a town that has traditionally been a hub for metalworking,


Hermle is a leading manufacturer of precise and efficient metalworking machines. The company began manufacturing in 1938 and over 26,000 of its machines have been installed worldwide in industries ranging from medical technology, classic tool and mould making, to aerospace technology. Being modular, the company’s individual


systems can be mixed and matched in order to provide the best combination for the requirements. A customer might, for example, choose milling spindles with different speeds and tool holders, or tool magazine extensions for more than 500 magazine places, or perhaps a comprehensive modular system for workpiece automation. Hermle uses Murrelektronik’s compact and


robust Cube67 modular IO system for the machine’s electrical installation. These fully potted modules are mounted directly on the machine without terminal boxes or switch cabinets. A bus node makes the connection to the higher-level fieldbus system. At the same time, it is the starting point for the installation which extends into the machining centre. The Cube67 IO modules are installed close to the process, allowing Hermle to connect the sensors and actuators with the shortest possible M12 cables and connectors. Of further benefit, the modules are daisy chained to each other with an easy-to-recognise green jacketed system cable that transmits both power and data, simplifying the installation and reducing the space needed for routing cable.


MAXIMUM STANDARDISATION Customers are able to design their machines the way they want thanks to the options available.


14 DECEMBER/JANUARY 2020 | DESIGN SOLUTIONS


assembled at the customer’s site, with one example being the coolant systems. “In order to be able to put the machine into operation, the commissioning has additional test equipment. This allows it to simulate the final configuration,” said Hans-Peter Marquart, head of electrical design at Hermle. This means that the company puts the machines into operation in the configuration that will later be used by the


made up of sensors, but at another point in the machining centre you may have the opposite need – an input in an area filled with outputs. Without multifunctional ports, two modules would have to be placed in each of these areas, making for an expensive and complex solution. Cube67 integrates one module at a time, on which the ports are set accordingly. Fewer modules are therefore required, which lowers both the amount of space needed and the assembly costs. In addition to ‘standard modules’, Hermle also


uses function modules. An encoder module is used to measure the flow of the hydraulics on the pallet system – this counts the pulses on site and transmits the process value to the controller where it is further processed and evaluated. End customers also benefit from using Cube67


because of the pin level diagnostics. Hermle and its control manufacturers have developed masks that visualise the diagnostic data. These let the end customer see immediately if a fault is occurring at a point on the machining centre. Troubleshooting can therefore be carried out quickly, resulting in higher machine availability and greater cost-effectiveness.


The compact Cube67 modules are installed next to the process. Sensors and actuators are connected with the shortest possible cables and connectors


operator. Individual options can be ‘switched on and off’ as required. When done this way, machine configuration is very quick and, because it contains all tested modules, process reliability is also high. This is important because the company delivers


its machines all over the world. Commissioning is carried out according to the plug-and-play principle – quickly and without any risk of programming errors. For Hermle, the biggest advantage of MOM is that it does not maintain its own software for each machine and can therefore be used individually. The multifunctional M12 ports on the Cube67


Digital IO modules are a major advantage for the company. For each PIN 2 and PIN 4, the user can define whether they are to be used as inputs or outputs, opening up a wide range of design possibilities. For example, you may need an output in installation areas that are primarily


MOVING INTO THE FUTURE In the future, Hermle’s machining centres will be equipped with PROFINET. The Cube system, with the bus node as an interface to the higher-level network, is worth its weight in gold, the company states. IO-Link devices will be able to be integrated with very little effort. Marquart explained that the company


doesn’t want to change the architecture itself but optimise it further. With Cube67, it can change out the bus node while continuing to use the installation that spreads out under it.


Murrelektronik www.murrelektronik.co.uk


The modules are daisy chained to each other 


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