PFFC - December 2008 - (Page 39) Web Exclusive | Do you need a dust-free solution? Visit www.pffc-online.com for exclusive content from Warner Electric on magnetic particle clutches and brakes. TENSION CONTROL this is going to affect the rug“The other area in which it’s is moving forward, you need gedness and reliability of the to slow down to keep the ten- beneficial is in wash down, because you don’t have to be care- load cells.” sion, and unless the motor is ful if you spray them down since Finally, Durfee says more physically capable of absorbthey’re rated to be submerged,” converters will be taking ing the energy back out of advantage of Ethernet conthe motor and putting it back notes Darren Irons, product manager for Magpowr. Adds nections as they become more into the AC line, it will just Brockelbank, “IP-67 is pretty standard on tension controls. idle there,” he explains. “So Substrates Getting Lighter you need to operate in both a much the highest degree of con- They allow converters to Vincent Genovese, president update the software on their drive and a regenerative mode trolled environment.” of Nireco America, says the Transducers or “load cells” control systems or allow the to maintain tension, and a broad range of materials being normal servo drive doesn’t measure actual web tension in manufacturer to troubleshoot converted on equipment that drive problems directly over the have regenerative capabilities.” almost any moving web or filaoriginally may have been deInternet without a service call. signed to handle just one sub“It’s available now, and a strate also has offered special lot of people are using it,” says We’re seeing a decrease in the tension challenges for convertDurfee. “Most of the larger ers and suppliers alike. For OEMs are building it into & the number of example, controls that utilize their equipment, and a lot of brakes to maintain tension on them are actually requiring number of paper and board substrates an Ethernet connection from aren’t ideal for lighter materitheir machine. It’s part of als, such as thin gauge films, their warranty. This is absobecause they can stretch the lutely the future of where our —Vincent Genovese, film. Consequently, many industry is going, remotely tension controls now use four being able to diagnose and aspresident of Nireco America quadrant regenerative drives sess a situation or a job.” in which the motor acts as a brake and regulates tension when the web is accelerating uSupplier Infot uDover Flexo Electronics | and decelerating both forward Doug Brockelbank, national ment, then output an accurate, reliable signal to an indicator or www.dfe.com and reverse. sales manager of Montalvo PFFC-ASAP 326 “In the industry we’re seeCorp., agrees that many OEMs controller. The controller then uCleveland Motion Controls | ing a greater decrease in the automatically compensates for are installing regenerative mowww.cmccontrols.com number of brakes and the tors on the direct drive machine variations in roll diameter, speed, PFFC-ASAP 327 and web material characteristics number of stand-alone tension rewinds to assure that the rolls uNireco America | to maintain desired tension. controllers being required,” says “hold up well” for further “It is extremely critical these www.nirecoam.com Genovese, citing the lighter ma- processing. “We find that pneuPFFC-ASAP 328 terials being converted at higher matic controls provide for what load cells work in all types of uMontalvo Corp | speeds. “When you’re using any I call infinite resolutions, which atmospheres and climates,” says Scott Durfee, district sales www.montalvo.com sort of brake, the web has to can give a much finer level of manager for Maxcess Intl. “A PFFC-ASAP 329 provide the energy to accelerate control than digital drives.” carpenter expects his measuruMagpowr | the rolls. But with lighter maRating the Units ing tape to function whether www.magpowr.com terials, you cannot sustain the it’s 45 degrees [Fahrenheit] out PFFC-ASAP 330 tension requirements to acceler- One of the recent developor 90 degrees, whether it’s a ate and decelerate the machine; ments in transducers has dry or wet climate. Basically, the tension required to acceler- been the broader use of an IP (Ingress Protection) ratconverters should expect the Contributing editor Edward ate the rolls exceeds the nominal tension of the materials, and ing system that indicates how same [performance] from their Boyle, based in Reading, PA, has impervious the units are to load cells. The IP-67 rating covered the converting industry you get undue stretching. So means more than [being able for more than 24 years. Contact you need to provide the energy, contamination and water. The standard ratings are IP to] just stick it in the middle of him at EJB Communications; 610and for the most part, the way 65, which indicates the unit a pond; it means that none of 670-4680; ejbcomm@aol.com. to do that is to put a drive in is impervious to airborne place of the brake.” Genovese says the best way contaminants such as dust, and 67, which indicates the Want To Learn More? to solve the problem is to use unit still can function after Find more new tension control products on our website at regenerative four-quadrant www.pffc-online.com and be sure to visit the Web Handling drives, which are able to accel- being submerged for up to 15 minutes in three feet of water. One Stop on our home page where you’ll find a drop down link erate and decelerate the web This is most commonly found to more great articles on tension control. while running both forward and reverse. “When the motor in papermaking operations. transducers and controls for Cleveland Motion Controls. “And when it comes to tension transducers, converters want it as simple as possible to integrate them with the rest of the machine.” brakes stand-alone tension controllers. WWW.PFFC-ONLINE.COM DECEMBER 2008 | 39 http://www.pffc-online.com http://www.dfe.com http://www.cmccontrols.com http://www.nirecoam.com http://www.montalvo.com http://www.magpowr.com http://www.pffc-online.com http://WWW.PFFC-ONLINE.COM
For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.