power transmission - Ptreview

Rotalink’s new low cost speedand direction controllerAs part of its DC motor controlrange, Rotalink has developed a lowcost speed and direction controllerfor motors up to 1.5 A that featuresPulse Width Modulation for highquality speed control with an onboardpotentiometer for smoothand precise adjustment. The boardmounted unit, measuring just 63 mmx 46 mm, has a wide user supplyrange from 7 to 24 VDC with thesingle-turn potentiometer set at 50%for zero speed. The unit is aimed atOEMs and users who wish to includea simple yet practical speed anddirection control for Rotalink motorswith a single source supply, andwithout the unnecessary burden oftheir own design and manufacture.The new speed and directioncontroller may be used acrossRotalink’s extensive rangeof brushed DC motors whichincludes standard ferrite and highperformance rare earth magnetsystems as well as heavy casedesigns. The controller provides aconvenient control solution as partof Rotalink’s strategy that combinesbrushed and brushless DC motorsChain manufacturer iwis introducesanti-backbend chains. Thesechains, which are flexible in onlyone direction, are used for pushingloads and transmitting forces overlonger distances without the needfor a guidance system. Developedto specific customer needs, antibackbendchains are used throughoutthe world in applications such asmedical devices, transport systems,building services engineering andmachine tools.Chain specialist iwis offers antibackbendchains under the iwis andElite brands. Compact in design, thechains are suitable for transmittingtensile and compressive forces, anddo not need a guidance system evenover longer distances. Anti-backbendchains perform a similar function aslinear drives, eliminating the need foran endless, circulating chain drive.The side- and backbend capability isindividually adjustable. The chainscan be made in a range of sizes andconfigured for various drive concepts,including for larger strokes.In its own research and developmentfacility, iwis has been developingas well as AC motor technologieswith its own innovative gearbox,motor feedback and motion controls.Rotalink provide competitiveminiature power transmissionsolutions of up to 28 Nm outputtorque for rotary motion and to morethan 50 N force for linear motion.The full range includes a wide choiceof planetary and spur gearboxesthat feature standard or enhancedpolymer gears on sintered or ballbearings. Rotalink manufacturea unique range of ovoid stylegearboxes with extremely high torqueoutput that combine spur gears withplanetary stages using ultra-polymermaterials technology.Rotalink also manufacture a range ofincremental and absolute feedbackdevices as well as motion controlsfor DC motors. The Red Drivecontroller is available for brushedand brushless motors and featureseasy-to use drag-and-drop flow chartprogramming for motion control andcombined TTL logic I/O.For reader enquiries, pleasemention PTR:Zena TilyardRotalink LimitedCropmead, Crewkerne,Somerset TA18 7HQTel: +44 (0) 1460 72000Fax: +44 (0) 1460 74278Email: zena@rotalink.comwww.rotalink.comAnti-backbend chains transmittensile and compressive forceanti-backbend chains for 15 years,continually incorporating its latestfindings about the factors affectingchain geometry and assemblytechniques on the chain’s technicalcharacteristics. The chains aredeveloped in close cooperationwith users and can be fabricatedat various production sites. Themanufacturer’s services include wear,fatigue strength and fracture loadanalyses. Quality is ensured throughin-house developed test methods andequipment.For reader enquiries, pleasemention PTR:iwis drive systems Ltd.Unit 8C Bloomfield ParkBloomfield Road, Tipton,West Midlands DY4 9APTel.: 012 15213600Fax: 012 15200822Email: salesuk@iwis.comwww.iwis.comMar/Apr 2011 PTR 19Brushed or brushless DCmotor gearboxes withthe option of dualchannel incrementalencoders.Single or multi rotation10 bit per revolutionabsolute shaft encoders.