friction clutches - Arten Freios e Embreagens Industriais

Table of ContentsCenter Pivot Web GuidesWeb guiding without side-tosidedistortion or wrinkling.Center Pivot Web Guides won’tcause wrinkling because theydon’t create the side-to-sidetension variations that end pivotguides do. Also, unlike end pivotguides, they can operate whenmounted in any position.Center pivot guiding is the kindestto your webs. Its configurationgenerally requires smaller leadinand lead-out distances thanend pivot guiding. Proper correctiontakes fewer degrees ofroll movement. Less web movementmeans less stress on theweb and a shorter lead-out distanceis needed to stabilizetension. This makes the wholeguiding system more compactand reduces “hunting” and overcorrectingthat requires slowerweb speeds and increases waste.Applications• Mid-process• Web converting• Web printing• Web slitting• Web coatingWeb ProductsChoose from 3 stylesThe Self-Contained CenterPivot Web Guide models have aNexen linear actuator, automaticcentering sensor, controller andweb guide sensor built right intothe guide roll mechanism. Yousimply mount it and provide100-240 VAC power.The Small Free Standing WebGuides have an actuator andautomatic centering sensor builtinto the guide roll mechanism.These models come in standardroll lengths of 9" (229mm), 12"(305mm) and 15" (381mm), andrequire a 16 foot (5M) interfacecable.The Large Free Standing WebGuides also have a built-inactuator, an automatic centeringsensor and include a 16 foot(5M) interface cable. They comein standard roll lengths of18" (457mm), 21 (533mm),24" (610mm), 28" (711mm)and 32" (813mm). The FreeStanding models let you choosefrom a wide range of sensorsand controllers to best suit yourapplication.Features and Benefits• Self-contained guides are acomplete package andcompletely pre-wired. Simplymount and supply 100-240 VAC.• Web correction withoutwrinkles. These guides makethe proper corrections to keepyour web at highest speedswith the least amount of stress.• Optional roll finishesaccommodate materials withdiffering coefficients offriction, such as polishedfilms and rubber sheets.• Completely U.S.A. made.• Ideal for tight installationsbecause they operate whenmounted in any position.• Complete technical supportand field service available.• A complete line of sensors,tension control systems andtension control clutches andbrakes from Nexen let youmatch components and systemsthat best meet your needs.WEB GUIDING CONTROLS ◗CENTER PIVOT WEB GUIDESControlled alignment for reduced scrap, increased line speeds and improved roll quality.Large Free Standing Center Pivot Web GuideGuide RollTurned and ground aluminum.Available in 5 roll lengths.Optional finishes available.How Nexen gives youworry-free, wrinkle-freeweb guiding.Nexen Center Pivot WebGuides let you run your webwith minimal waste and set-upbecause you make correctionson-the-fly at high speeds.Corrections are made withoutside-to-side tension distortionsthat cause wrinkles. This alsominimizes web stress that cancause web breaks.Operation and installation aresimple. The web guides canoperate when mounted in anyposition (Figure 1). Entry guiderolls and exit guide rolls are partof the web guide mechanism.Lead-in and lead-out rolls arecustomer supplied (Figure 2).Calculate lead-in and lead-outdistances and mount the webguide. Lead-in and lead-outdistances should be at least aslong as the web width.Preferably, these distances are1.25 times the web width.On the Free Standing Web Guides,mount the sensor between theexit guide roll and the lead-outguide roll (Figure 2). The sensoris already properly mounted in theSelf-Contained Web Guides.The web always enters the uniton the pivot side and exits onthe sensor side.Figure 1Easy wiring–socket includedAuto centering switch includedActuator includedIntegral mounting baseFigure 2327