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Bruel And Kjaer Helps To Test Lift Sound Quality

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Orona has used Bruel and Kjaer 's Head and Torso Simulator (HATS), binaural microphones and Pulse sound-quality software to analyse the sound-quality behaviour of its lifts. This equipment allowed it to correlate the sound quality with the different noise sources and to study the most appropriate ways to improve lift comfort. Orona (manufacturer of lifts), Mondragon Goi Eskola Politeknikoa (MGEP [Engineering Faculty of Mondragon University]) and Ikerlan (Research Centre) formed a consortium to investigate the sound quality in Orona's lifts. According to Unai Galfarsoro, the coordinator of the acoustic and vibration group at Mondragon University: 'The reason for establishing the sound-quality project is the need to go beyond the traditional A-weighted sound pressure level, which is usually used to rank different noise sources, because we believe that a complete sound-quality analysis gives wider and more reliable results. 'The objective is to analyse the actual sound-qua...

Heavy Lift Crane Works With CNC Roll Grinder

Voith Paper's Manchester manufacturing plant has installed a 120-tonne crane from Street Crane to ensure efficient and safe loading and unloading of the grinding machine. The machine will grind and produce perfect geometry and balance in paper machine rollers of up to 115 tonnes. The crane will be used for loading and offloading vehicles and positioning rollers onto a CNC controlled Waldrich Siegen roll grinder and up-rated IRD balancing machine. This requires precision movement and an auxiliary 10-tonne hoist is provided to permit rotation and final manoeuvring of the load. Major structural elements of the crane include twin box-beam girders for rigidity with eight-wheel carriages to spread the load. Hoisting is achieved via a heavy-duty crab unit based on a twin scrolling open barrel hoist design that ensures the hook follows a true vertical lifting path. Programmable microprocessor controllers, along with digital frequency inverters on the motor drives, provide smooth accelerat...