DAC102021

62 n NEW PRODUCTS October 2021 www.drivesncontrols.com WEG has launched a range of electronically-commutated motors which, it claims, will reach an anticipated IE6 level of efficiency – the highest on the market – with 20% lower losses than the IE5 levels as defined in IEC TS 60034-30-2. The WECM (WEG Electronically Commutated Motor) motors, available in single or three-phase versions with power ratings up to 4kW, are aimed mainly at exhaust and ventilation systems. The IP55-protected permanent magnet brushless motors have integrated inverters. Speed control can be selected either locally or remotely using DIP-switches inside the drive cover. The speed ranges are 200–1,500/1,800 rpm or 500–3,000 rpm. The ability to vary speeds not only cuts energy use, but also reduces costs compared to using separate motors and inverters. Because the inverter is integrated, there is no terminal box, or cables between the motor and inverter, saving space. The motors can be built into axial, radial and centrifugal fans and air-handling units, helping to comply with EU 327/2011 Ecodesign requirements for fans driven by motors rated at 125W– 500kW. They boast noise levels below 50dBA, low vibration levels and high efficiency across their operating speeds. WEG www.weg.net KTR has launched a shaft coupling which, as well as transmitting power, compensates for misalignments and dampens torsional vibrations. The torsionally flexible Rolflex coupling is available in two designs (N and SH Split) and seven sizes with torque ratings from 65–790Nm. Another five sizes will be added by the middle of 2022, extending the range up to 5kNm. The short-shaft coupling, which conforms with DIN 740, is made of grey cast-iron. The input and output shafts can be pushed together by 3–6mm, depending on their size. The torque is transmitted via elastomer packages which also compensate for misalignments and dampen shocks and torsional vibrations. Should the elastomers fail due to extreme loads, the failsafe coupling continues to hold the torque. In the SH Split design, the cam hub is separated into two halves by “fracture cutting”, or “cracking”. The resulting fracture surfaces centre the halves precisely with each other, making incorrect assembly almost impossible. KTR https://www.ktr.com/uk Keyence has introduced an inline telecentric measurement system which measure parts rapidly and consistently as they pass by. The silhouette-based TM-X5000 system has an exposure time of just 25μs – claimed to be 40 times faster than conventional models, allowing accurate measurement of high-speed targets by eliminating blur. The system can be used for: geometric dimensioning and tolerancing; outer diameter and profile measurements; abnormality detection; and runout and positioning. Specially designed optics improve measurement repeatability by increasing uniformity across the field of view. The system is claimed to offer 100 times better telecentricity – just 0.0001 degrees – than conventional telecentric optical systems, ensuring confidence in the results, even for misaligned targets. A ±15mm depth-of-field provides sharp edges and stable measurements, even if the target position varies. As well as the standard model, there are ultra- high accuracy and wide-field variants. Keyence www.keyence.co.uk/tmxrelease Electronically commutated fan motors offer ‘IE6’ efficiency Telecentric measurement system promises 100-fold improvement NSK Linear Motion Control has announced a series of miniature high-speed, large-lead ballscrews, said to offer benefits including shorter product takt times, the potential to downsize equipment,, and reduced power consumption. The load on motors has been reduced by making the ballscrew shaft diameter as small as possible to reduce inertia, while increasing the lead using new manufacturing techniques. Rotational speeds of up to 5,000 rpm are achieved using a high-speed, low-noise end deflector recirculation system. The shafts are available in diameters of 6 or 8mm, while there lis a choice of leads: 8, 10, 12 or 15mm. A low-profile nut reduces flange and nut heights by up to 33% compared to conventional ballscrews, helping to downsize machines and save energy. The ballscrews, part of NSK’s Compact-FA series, are said to be ideal for applications requiring relatively short strokes, enabling operation at high acceleration and deceleration, as well as traverse speeds exceeding 1.25m/s – surpassing the performance of linear motors and helping to cut takt times. They can also replace small air cylinders for high-speed and high- precision multipoint positioning. The ballscrews contain no hazardous substances. NSK Europe www.nsk-literature.com/en/ compact-fa-ball-screws Large-lead ballscrews can cut equipment sizes, takt times and energy use Shaft coupling compensates for misalignments and dampens torsional vibrations