1 year ago

MDA Technologies 2/2014

MDA Technologies 2/2014


Drive Technologies DC drives and Scada system improve productivity of steel mill Sprint Electric has supplied digital DC drives for the control system in a steel mill in Turkey. The retrofit has resulted in improved output, reduced waste and less down time. The Turkish company Kocaer Haddecilik, founded in the early 1960’s, is a producer of profiled steel products: T-bars, square bars, flat bars and custom window profiles. Kocaer Haddecilik needed to increase the production capacity of their facility based in Aliaga, Izmir, Turkey. They contracted VIB Otomasyon, a Turkish company specialized in automation and drives solutions, and their system integration partner Teori Elektrik. By using a Scada system, complete with Profibus, Ethernet and fibre-optic networking, Kocaer Haddecilik was able to improve the steel mill’s output, reduce waste and minimize down time. The complete facility from furnace, to shears, to packaging is now controlled using three operator stations and one engineering station. How the steel is formed and cut by the mills and shears is an important part of the process. The workloads involved made using DC motors and drives a necessity. VIB Otomasyon needed compact DC drives, which could be easily integrated into the overall control system. They choose Sprint Electric’s range of PLX digital DC drives. The PLX has an extensive suite of software application blocks included as standard. The built-in range of macros made controlling three important process stages quick and easy. Cascade control is used to control the tension of the steel between two mills. The PLC automation system allows the operator to control the tension between any two mills, without affecting the rest of the line. This is done using fast calculation of reference speeds, the fast response of the PLX DC drives and the feedback supplied by the 1000 line encoders. The PLX is also used for loop control; by changing motor speeds, the DC drive can maintain zero tension in the steel. To control the flying shear accurately, the PLX’s spindle orientation block is used. The built-in software enables quick acceleration, good repeatability and a precise stop position. The 5 cm difference between minimum and maximum product lengths means Kocaer Haddecilik can accurately cut steel depending on its customers’ requirements. With the improvements made with their new rolling mill process line, Kocaer Haddecilik expects to double their production capacity. Besides the metal processing industry, PLX DC drives from Sprint Electric are being used in many other applications including the pulp and paper industry, rubber and plastic processing, lifting equipment, food processing, pharmaceutical and chemical manufacturing. PLX drives are designed to offer a powerful, flexible and easy to programme digital DC drive. The drives’ extensive range of application software functions enable difficult tasks to be completed easily and efficiently without costly external hardware. The PLX is part of an integrated range of 2 and 4 quadrant DC drives. The range’s functionality and compact design has proven to be ideal for retrofits when a more cost effective, modern drive system is required. About Company name: Sprint Electric Headquarters: Arundel, West Sussex, United Kingdom Established: 1987 Products: Industrial Motor Control, Drive Configuration And Monitoring Software, PLA - Applications Modules, Digital Panel Meters 40 MDA Technologies 2/2014

Antriebstechnik Product News Slip Ring with Diagnostic System Linear actuators provide new levels of performance Thomson’s recently announced PC-series precision electric linear actuators are available from UK authorised distributor Heason Technology. With the highest power density of any Leine Linde Systems presents the new ADSR, the first slip ring with a diagnostic system for analysing condition and predicting remaining service life. Wind turbines, both onshore and offshore, are usually geographically distributed, and are therefore relatively far from service stations. As a result, unexpected servicing is incredibly involved and expensive. Thanks to the new ADSR, wind turbine manufacturers, managers, and operators will benefit from an advanced diagnostic system – fully integrated into a high-quality customized slip ring. The system continuously analyses the condition of the slip ring and predicts an error before it even occurs. ADSR makes planning wind turbine maintenance more efficient, making it possible to largely avoid unexpected downtimes and the resulting lost yields. actuator in their class, these compact and highly energy efficient actuators have been designed for continuous duty use as cost-saving replacements for traditional pneumatic cylinders – where they offer much simpler machine design with fewer components, considerably more flexibility in control, as well as much reduced maintenance and higher overall performance. Thomson estimates that replacing pneumatic cylinders by the PC-series for many applications can generate energy savings per-axis which exceed the cost of the new actuator in only one year. Other benefits include the inherent flexibility offered with electric automation especially where frequent machine changes are required – by simply changing end point and profile positions in the control program rather than physically needing to adjust end-stops on pneumatic machines. Fast shaft-hub connection With its RfN 7070 and RfN 7075 models, the company Ringfeder (Germany) offers two clamping sets with a central nut, which make grooving the shaft and hub superfluous. In just a short time, the self-centering clamping elements allow precise axial and radial positioning of the components. In order to assemble toothed belt pulleys and toothed and sprocket wheels onto the shafts, the clamping set is first pushed into the hub and then onto the shaft. Subsequently, the lock nut must be tightened onto the specified tightening torque. Secure fitting on the shaft ensures uniform surface pressure. Disassembly is also easily achieved. Motion, Drive and Automation 30 Maintenance-free bearings support one of the world’s longest suspension bridges I N T E R N AT I O N A L E D I T I O N 6 September 2013 Click to read previous issues. Inspiration is just one click away. News about the following markets: 16 geared Gravel plant reduces costs and maintenance by using motors 18 26 Winter Standard components are used to drive scraper chain conveyors in Norway Air Springs: keeping things moving at the 2014 Olympic Games in cooperation with Fluidtechnik MDA Technologies 2/2014 41


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