November 22, 2012 A Penton Media Publication Tune in to EngineeringTV.com Reengineering the SNOWMOBILE page 34 HANDLING EMI WITH INDUSTRIAL FIBER OPTICS, page 38 ENERGY-EFFICIENT CASTINGS, page 42 BETTER HEAT SINKS WITH MULTIPHYSICS, page 45 APPLIANCE WIRE GETS A ROLE IN MACHINE BUILDING, page 48 RS# 101 RS# 102 TAILORED AVNET SOLUTIONS MEET YOUR UNIQUE NEEDS From big to small – we it all Even big products begin small, with millions of sizes in between We see them all Here at Avnet, no order is too small Avnet provides products and services to match your needs No matter the location; whether you are in the new product introduction phase or extending a product’s life If you need design support, or supply chain assistance – we’re here to help With Avnet, you determine the scale of interaction – or complexity – and we will support you every step of the way, so it’s a perfect fit! What can we for you? www.avnetexpress.com Accelerating Your Success!™ 800 332 8638 | www.avnetexpress.com | @avnetdesignwire VOLUME 84 ISSUE 18 NOVEMBER 22, 2012 ELECTRICAL/ELECTRONIC TECHNOLOGY GUIDE Safety standard gives Appliance wire is back, but regulations may limit its use AWM and NFPA compliance APPLIANCE WIRE a new lease on life High-end AWM-style cables are making a comeback in machine wiring providing over 20 years of reliable performance FEATURES Authored by: Rick Orsini Senior product manager Lapp USA Florham Park, N J Edited by Robert Repas robert.repas@penton.com Key points: • NFPA-79 outlines electrical standards for industrial machinery to protect operators, equipment, and facilities from fire and electrical hazards • Banned in 2007, AWM may now be used in machine wiring, restrictions permitting 34 • New permissions may let MTW products that carry a UL TC-ER listing slash installation costs, even over AWM Rethinking the snowmobile Resources: NFPA 79 Standard, bit.ly/Rbblbv UL Wire and cable flammability testing, bit ly/TxHTv2 economics for 38 Better industrial fiber optics Plastic optic fiber is a better option than copper wiring for applications plagued by electrical noise with quartz 42 Casting The casting of synthetic-quartzcomposite mixtures to tolerance uses less energy than casting iron For a white paper on the NFPA 79 electrical code, scan this code or go to: http://machinedesign com/whitepaper/ understanding-theelectrical-code-to-becompliant-0501 48 MACHINE DESIGN.com Appliance wire OK’d The key change to NFPA-79 for 2012 involves the ability to use appliance wiring material (AWM), which had been banned since 2007 AWM can be an economical wiring choice compared to higher-performing UL-listed machinetool wire (MTW) But there were several sound reasons behind the AWM ban For one, some contractors were using AWM incorrectly as part of the building infrastructure The NEC does not recognize AWM for this type of use Also, not all AWM products are created equal when it comes to the quality of their insulation layer The insulation thickness of low-quality commodity cabling varied such that the wire, while meeting its electrical insulation requirements, was not sufficiently flame resistant for use in industrial machines It’s important to stress that not all AWM suffers from these quality issues Lapp and other reputable cable manufacturers can and produce AWM products whose insulation wall thickness is both consistent and adequate for the voltage rating of the cable High-quality AWM can pass the specified vertical flame tests (FT 1) and can safely be used in industrial machines Keep in mind, however, that AWM lacks the extra layers of PVC-nylon insulation found in Lapp USA, www.lappusa.com Technology borrowed from motorcycles, snowmobiles, mountain bikes, and snowboards leads to a lighter, more-nimble Personal Snow Vehicle If you find electrical safety standards confusing, you’re not alone Many machine builders recently grappled with an ambiguous round of changes to NFPA-79 This is the National Fire Protection Association code that outlines electrical standards for industrial machinery that protects operators, equipment, and facilities from fire and electrical hazards NFPA-79 is cited extensively in the National Electrical Code (NEC) that governs the electrical wiring of industrial machines The standard cuts a broad swath across the industrial machinery landscape It applies to a comprehensive range of machines — everything from machine tools and injection-molding presses to testing machines and packaging lines It encompasses all of a machine’s electrical and electronic elements operating at 600 V or less This means that a vast majority of machine power, control, and lighting circuits fall under the scope of NFPA-79 Machine builders complied with the dictates of NFPA-79 for years But earlier this year the standard underwent revisions that make it more difficult to specify compliant electrical cabling NOVEMBER 22, 2012 A Krones technician documents the use of AWM in compliance with NFPA-79 One company successfully navigating the shoals of the recent NFPA-79 revisions is Krones Inc., Franklin, Wis., a manufacturer and integrator of packaging lines for food and beverage companies The company’s engineering team recently found that compliant AWM usage does require a bit of extra effort compared to the automatic compliance found with UL-listed MTW “Whenever you must implement changes because of an electrical-code change, there’s definitely an engineering-labor factor,” says Mike Nelson, the Krones engineer charged with NFPA-79 compliance Some of that engineering labor went into researching specific AWM products to see whether they meet the compliance restrictions Even proper jacket labeling doesn’t answer every compliance question regarding AWM “You can’t tell whether a product complies just by looking at the cable,” says Nelson And even more engineering labor went to NFPA-79’s documentation requirements In all, Nelson estimates that Krones has spent more than 150 engineering man-hours complying with the requirements related to AWM use And that figure represents just the work done to formulate a compliance strategy It does not include the technical documentation and drawing changes needed to incorporate the wire into each and every machine NFPA restrictions In the case of extremely large machines MTW This extra insulation allows some types of MTW to such as bottling lines, machine builders and installation pass flame tests (FT 4) more rigorous than those for even contractors can spend dozens of engineering hours and the best AWM thousands of dollars complying with the documentation Reversing the AWM ban reflected the realities of the requirements global machinery marketplace in which AWM remains a These documentation needs, while not insurmountwidely used cabling choice The restrictions imposed by able, must be factored into the cost of wiring the machine the new NFPA standard attempts to negate the potential In some cases, the added documentation costs can erode drawbacks of AWM the minor price advantages of some AWM cables The first restriction states that the AWM must be idenOne way around the concern of documentation is to tified as suitable for the application at hand and must be favor listed MTW Because it inherently complies with used in accordance with the machine-manufacturer’s inNFPA-79, MTW cabling alleviates the documentation structions Other restrictions detail cable construction inrequirement and eliminates any residual confusion over cluding minimum conductor count, flame resistance, and whether a given AWM product is approved and properly wall thickness Compliant AWM cable must carry a jacket labeled MTW also has a host of technical advantages that print legend that spells out the AWM style number, voltderive from its superior flexibility and resistance to flame, age, temperature rating, and flame rating The reversal on AWM usage also requires more documentation For exampl e, m anu f a c tu re rs Certain UL-listed cables meet exposed Another change in the 2012 NFPAmust provide field-instalrun (-ER) specifications, which provide an 79 standard allows exposed cable runs lation information related additional level of protection for these along the structure of the equipment or to the AWM wire with types of applications Cables meeting -ER in the machine chassis As long as the exeach machine’s technical requirements are subjected to the same posed cables closely follow the surface documentation Exposed cable runs for fast installation Easy compliance Given all the cable runs on and around today’s complex industrial machines, the need to cument AWM usage for each and every machine represents the most onerous of all the and structural members of the machine, the installation does not require conduit, raceways, or any special hardware Thanks to reductions in installation time and labor, exposed cable runs can reduce costs dramatically compared to traditional installation methods that need conduit or special mounting hardware crush and impact tests as armored-type or metal-clad (MC) cables, that lets cables leave the machine area and enter a cable tray without conduit Keep in mind, though, that not all ULlisted cables meet NFPA requirements, especially lower-priced commodity and rigid products NOVEMBER 22, 2012 48 Safety standard gives appliance wire a new lease on life CAD/CAM/CAE/FEA builds a better heat sink How Toyota designed a small, efficient heat sink to cool electronic components in its future hybrid vehicles Multiphysics software builds a better heat sink Authored by: Ercan (Eric) Dede Principal Scientist Toyota Research Institute of North America Ann Arbor, Mich Edited by Leslie Gordon leslie.gordon@penton.com, Twitter @ LeslieGordon • Engineers designed a smaller and moreefficient heat sink to thermally regulate the electronic components in future Toyota hybrid vehicles • Numeric simulations generated an optimal cooling channel topology with fluid streamlines in branching channels • The dual configuration prototype provided higher-performance cooling in an ultracompact package Resources: Toyota Research Institute of North America, http://tinyurl.com/8kdkq3r It’s no secret that These carmakers are under isometric a lot of pressure to reduce views show the the number, size, and weight of derived hierarchical engine components for better fuel microchannel cold plate economy In one case, we were tasked with without a jet plate (top) designing a smaller and more-efficient heat and with a jet plate shown transparent for sink to thermally regulate the electronic clarity (bottom) components in Toyota hybrid vehicles Instead of using typical analytical design methods and trial-and-error physical prototyping, we first used multiphysics software to design and test possible prototypes Hot under the hood Toyota hybrid vehicles have sophisticated electrical systems in which many power diodes and power semiconductors — such as insulated-gate bipolar transistors — handle power conversion and other applications These components are standard planar silicon devices measuring a few centimeters on each side The devices mount on aluminum heat sinks, or cold plates, with channels in which a water-andNOVEMBER 22, 2012 MACHINE DESIGN.com Toyota used multiphysics software to build a better heat sink for its future hybrid vehicles 45 45 Access our Reader Service Web site to quickly find and request information on the products and services found in the pages of MACHINE DESIGN www.machinedesign.com/rsc MACHINE DESIGN.com NOVEMBER 22, 2012 49 Appliance wiring material, banned in 2007, is now back in service owing to the realities of today’s global machine marketplace But, its use comes with restrictions MULTIPHYSICS SOFTWARE Key Points: MACHINE DESIGN.com with 1-ft cable and 4-wire locking connector SureStep stepping systems provide simple and accurate control of position and speed where open-loop control and cost are considerations Pulses (or "step" and "direction" signals) from Do-more PLCs, DirectLOGIC PLCs, or other indexers and motion controllers are "translated" by the microstepping drive into precise movement of the stepping motor shaft The SureStep stepping motors use 2-phase technology with 200 full steps per revolution or 1.8° per full step • • • • • • Available in single-shaft and dual-shaft models, starting at $18 Square frame step motor style produces high torque 2-phase bipolar, 4-lead 1.8° per step, 200 Steps per Revolution www.automationdirect.com Standard NEMA Sizes (17, 23, & 34) Go online or call to get complete information, CE Compliant - EN55014-1 (1993) & EN60034-1.5.11 request your free catalog, or place an order 1-800-633-0405 The SureStep family of motion products also includes microstepping drives with free configuration software, power supplies and cables, all at direct prices that can get you a 1-axis system for as little as $330.50, and axes for just $541 Visit www.automationdirect.com/stepper-systems for specifications and prices Microstepping Drives Step Motor Power Supplies NEMA Single-Shaft Step Motors Step Motor Extension Cables RS# 103 ON THE COVER DEPARTMENTS An SR-85 Snow Runner from Sierra Snow For customized article reprints and permissions please contact: Penton Reprints, 1-888-858-8851, e-mail at reprints@pentonreprints.com or visit pentonreprints.com EDITORIAL Silliness at 40 below 10 EDITORIAL STAFF 12 LETTERS 16 SCANNING FOR IDEAS Spindle drive moves with accuracy Filter vent equalizes pressure inside and out 20 REPORTER’S NOTEBOOK 26 LOOKING BACK 33 COMMENTARY What’s up with model-based engineering? 51 ORR ON ENGINEERING The death of e-mail? 52 SOFTWARE REVIEW SolidWorks 2013 makes 3D modeling easier 54 PRODUCT SPOTLIGHT Adhesives & fasteners 56 PRODUCTS Editorial content is indexed in the Applied Science Technology Index, the Engineering Index, SciSearch and Research Alert Microfilm copies available from National Archive Publishing Company (NAPC), 300 N Zeeb Rd., P.O Box 998, Ann Arbor, MI 48106-0998, Ph: 734-302-6500 or 800-420-NAPC (6272), extension 6578 Permission to photocopy is granted for users registered with the Copyright Clearance Center (CCC) Inc to photocopy any article, with the exception of those for which separate ownership is indicated on the first page of the article, provided that the base fee of $1.25 per copy of the article, plus $.60 per page is paid to CCC, 222 Rosewood Dr., Danvers, MA 01923 (Code No 0024-9114/12 $1.25 + 60) Subscription Policy: MACHINE DESIGN is circulated to research, development, and design engineers primarily engaged in the design and manufacture of machinery, electrical/electronic equipment, and mechanical equipment To obtain a complimentary subscription see our Web page at submag.com/sub/ mn For change of address fill out a new qualification form at submag.com/sub/mn Printed in U.S.A., Copyright © 2012 Penton Media, Inc All rights reserved MACHINE DESIGN (ISSN 0024-9114) is published semimonthly except for a single issue in January, February, June, July, and December by Penton Media, Inc., 9800 Metcalf Ave., Overland Park, KS 66212 Paid subscriptions include issues 1-18 Issue No 19 (OEM Handbook and Supplier Directory) is available at additional cost Rates: U.S.: one year, $139; two years, $199; Canada/Mexico: one year, $159; two years, $239; All other countries: one year, $199; two years, $299 Cost for back issues are U.S $10.00 per copy plus tax, Canada $15.00 per issue plus tax, and Int’l $20.00 per issue Product Locator, $50.00 plus tax Prepaid subscription: Penton Media (MACHINE DESIGN), P.O Box 2100, Skokie IL 60076-7800 Periodicals Postage Paid at Shawnee Mission, Kans., and at additional mailing offices 58 DATA FILES 60 BUSINESS INDEX 61 AD INDEX 62 BUSINESS STAFF 63 BACKTALK Can GST #R126431964 Canadian Post Publications Mail Agreement No.40612608 Canada return address: Pitney Bowes, P.O Box 25542, London, Ont., N6C 6B2 Digital subscription rates: U.S.: one year, $69; two years, $99; Canada/Mexico: one year, $79; two years, $119; All other countries: one year, $99; two years, $149 MACHINE DESIGN.com NOVEMBER 22, 2012 POSTMASTER: Send change of address notice to Customer Service, MACHINE DESIGN, P.O Box 2100, Skokie, IL 60076-7800 You Have Big Ideas We Have a Big Catalog 2013 Allied Catalog Over 110,000 products | Over 10,000 new products | Over 300 world-class suppliers New suppliers include Siemens Corporation and FLIR Commercial Systems RS# 104 1.800.433.5700 © Allied Electronics, Inc 2012 ‘Allied Electronics’ and the Allied Electronics logo are trademarks of Allied Electronics, Inc An Electrocomponents Company What’s new online machinedesign.com NEW EBOOKS Smart machines: Delivering intelligent maintenance capabilities Rapid technological innovation, demand for customized products, and requirements for more reliably maintained systems are spurring the rise of smart machines This eBook from National Instruments discusses the different approaches used to track and maintain machine health New technology for control-panel design This eBook from Eaton offers insights on how to simplify control panel wiring and design Topics include an overview of traditional panel design; key industry standards; protocols used in industrial networks; and how the SmartWire-DT system speeds commissioning of next-generation machines and control panels Download these eBooks at http://machinedesign.com/ebook Simple, low-cost robot The CEO of Rethink Robotics gives an overview of the Baxter robotic platform The inexpensive, easy-to-use robot is designed for small manufacturers who short production runs of many different parts It can be programmed by shop-floor workers and offers humanlike speed, precision, and strength Learn more at www engineeringtv.com/video/The-Baxter-RoboticPlatform-for;Only-Engineering-TV-Videos Selecting potting compounds Electronic and electrical equipment needs potting compound to secure, protect, and insulate components A Fabrico site, www.fabrico.com/markets-electricalequipment.htm, looks at considerations for evaluating potting materials, including device characteristics, environment, adhesive cure time and expansion rates, and overall costs It also discusses benefits of materials such as epoxy, polyester, urethane, and silicone EDITOR’S WEB PICKS Actuator-sizing software A new online sizing program from Tolomatic helps engineers design and specify electric actuators based on motion requirements like length, velocity, and acceleration, as well as orientation, loads, and applied forces It also lets users select a motor based on parameters such as continuous/peak torque and speed, and add features to the actuator like mounts and switches It’s compatible with PCs, tablets, and smartphones Learn more at http://sizeit.tolomatic.com Oil-cleanliness booklet More than 75% of all hydraulics problems can be linked to dirty oil Bosch Rexroth has published a 44-page booklet, on oil-resistant paper, that outlines common contaminant sources, the basics of contamination control, key filter properties, tolerances of hydraulic components, and recommended oil-cleanliness levels according to ISO 4406 It also covers monitoring and maintenance strategies to proactively diagnose problems before a failure Order a free copy at www.boschrexroth-us.com/filter Enclosure selector Rittal’s Web site (www.rittal-corp.com) helps engineers quickly design, size, and quote enclosures and climatecontrol products The SmartSelect tool lets users select MACHINE DESIGN.com NOVEMBER 22, 2012 the type of product and then specify dimensions, ratings, materials, and other parameters Results include exact matches and close alternatives, along with product details, drawings, installation videos, and related info The company’s QuickQuote application creates a bill of material and price estimate Users can also access the tools on most smartphones and mobile devices Controls catalog OTTO has published an interactive, 226-page magazinestyle PDF catalog on its switches, grips, joysticks, and control panels Content includes product data, technical specs, drawings and photos, and a comprehensive military cross-reference Download a copy, or request a print version, at www.ottoexcellence.com Structural simulation Ansys will host a free, 1-hr Webinar on November 29 on how to improve simulation processes The discussion covers large and complex model performance, modeling 3D-composite shapes, customizing processes for structural mechanics, crack modeling, mapping of external data, and contact modeling, as well as better ways to handle finite-element models Learn more at http://tinyurl.com/cknkp9x Fastener app PennEngineering has launched the PEMspec app for iPhones and iPads It lets users access critical installation dimensions for self-clinching, flaring, broaching, surface mount, and weld fasteners Data includes mounting-hole size, minimum sheet thickness, and installed height above sheet, among other criteria Users can search by fastener parameters or part number, and the app also contains pertinent links and contact information Learn more at www.pemnet.com CAD/CAM/CAE/FEA MULTIPHYSICS SOFTWARE builds a better heat sink How Toyota designed a small, efficient heat sink to cool electronic components in its future hybrid vehicles Authored by: Ercan (Eric) Dede Principal Scientist Toyota Research Institute of North America Ann Arbor, Mich Edited by Leslie Gordon leslie.gordon@penton.com, Twitter @ LeslieGordon Key Points: • Engineers designed a smaller and moreefficient heat sink to thermally regulate the electronic components in future Toyota hybrid vehicles • Numeric simulations generated an optimal cooling channel topology with fluid streamlines in branching channels • The dual configuration prototype provided higher-performance cooling in an ultracompact package Resources: Toyota Research Institute of North America, http://tinyurl.com/8kdkq3r It’s no secret that These carmakers are under isometric a lot of pressure to reduce views show the the number, size, and weight of derived hierarchical engine components for better fuel microchannel cold plate economy In one case, we were tasked with without a jet plate (top) designing a smaller and more-efficient heat and with a jet plate shown transparent for sink to thermally regulate the electronic clarity (bottom) components in Toyota hybrid vehicles Instead of using typical analytical design methods and trial-and-error physical prototyping, we first used multiphysics software to design and test possible prototypes Hot under the hood Toyota hybrid vehicles have sophisticated electrical systems in which many power diodes and power semiconductors — such as insulated-gate bipolar transistors — handle power conversion and other applications These components are standard planar silicon devices measuring a few centimeters on each side The devices mount on aluminum heat sinks, or cold plates, with channels in which a water-andNOVEMBER 22, 2012 MACHINE DESIGN.com 45 CAD/CAM/CAE/FEA glycol-coolant mixture flow In earlier model years, the cold plate featured a fluid inlet on one side and an outlet on the other side The long channels in between were mostly straight They provided adequate heat transfer but at the cost of a significant pressure drop across the plate We needed a much smaller and more-efficient design, but this meant that thermal management would be more difficult It might seem reasonable to simply redesign the cold plates so more coolant could flow through them But that would require more pumping power The limited space in the engine compartment meant that using a larger, more-powerful pump or an additional pump was unacceptable Therefore, we had to reengineer the cold plate to simultaneously get optimum heat transfer and negligible additional pressure drop The images show the prototype aluminum cold plates with (top) and without (bottom) the hierarchical microchannel topology Jets not enough Interestingly, many researchers have identified jet impingement as an attractive way to cool surfaces But while jet impingement performs well with respect to heat dissipation close to the jet, it doesn’t work well further away from the orifice That’s because most heat transfer Toyota’s numeric simulations produced an optimal cooling channel topology happens close to the jet enwith fluid streamlines in branching channels (left); normalized temperature trance where the fluid is the contours (center); and normalized pressure contours (right) coolest and flows fast Much of the heat-transfer capability is lost by the time the coolant exits One answer was to combine jet impingement with a between Comsol and Matlab peripheral channel to boost the area-average heat transfer The aspect ratio of the channels (i.e., ratio of height to Comsol Multiphysics CFD and Heat Transfer Modules width) was important, but to simplify the numerical simuwere essential to the numerical simulations at the heart lations we assumed a thin 3D structure and then further of our work And Comsol’s LiveLink for Matlab also let “flattened” it Once we derived an initial channel topolus work with the multiphysics simulations in a high-level ogy, we investigated the height of the fins that separate the scripting language to automate the process of improving cooling channels and performed a separate parametric the cold plate’s topology sizing study We had already done similar studies, so our We examined how the topology influenced variables assumptions were well informed such as steady-state convection-diffusion heat transfer Our numeric simulations generated an optimal cooland channel fluid flow We used well-established materialing channel topology with fluid streamlines in branchinterpolation techniques and a special optimizer, iterating ing channels Because the channels efficiently distributed 46 MACHINE DESIGN.com NOVEMBER 22, 2012 Toyota performed other numerical topology optimization simulations to study the fluid flow of a cold-plate inlet manifold comprising a single fluid inlet and six outlets The manifold could feed fluid to multiple multipass cooling cells The image shows the streamlines colored with velocity magnitude The curvy sidewall manifold shape was generated through Comsol fluid-flow topology optimization studies, where the goal was to minimize the pressure drop across the manifold while balancing the flow rate to each outlet nozzle coolant throughout the plate, we used the fractal-like topology to guide the design of a cold-plate prototype We set the size of the plate to 60 × 45 mm, with a middle cooling zone of 25 × 15 mm to match a specific heat source We assumed the plate’s base substrate thickness to be mm Real-world performance After using Comsol and Matlab to improve optimize the channel topology, we then used the final channel concept to design and evaluate a prototype using Comsol’s LiveLink for SolidWorks LiveLink lets users actively link to CAD, and it was easy to import various designs from SolidWorks back into Comsol to verify pressure drop and heat transfer This capability lets users quickly establish a reasonable starting point and progress from there quickly Last, we fabricated two physical prototypes based on the SolidWorks designs using standard micromachining techniques One prototype was a dual jet/hierarchical microchannel version and the other used jet impingement of a simple flat plate We tested the prototypes to see whether the dual configuration would indeed provide higher-performance cooling in an ultracompact package On average, it did dissipate 12.8% more heat than the flat-plater version With regard to pressure drop, both cold plates demonstrated similar results, but the dual version performed slightly better at higher flow rates MD RS# 129 ELECTRICAL/ELECTRONIC TECHNOLOGY GUIDE Safety standard gives Appliance wire is back, but regulations may limit its use APPLIANCE WIRE a new lease on life High-end AWM-style cables are making a comeback in machine wiring providing over 20 years of reliable performance Authored by: Rick Orsini Senior product manager Lapp USA Florham Park, N. J Edited by Robert Repas robert.repas@penton.com Key points: • NFPA-79 outlines electrical standards for industrial machinery to protect operators, equipment, and facilities from fire and electrical hazards • Banned in 2007, AWM may now be used in machine wiring, restrictions permitting • New permissions may let MTW products that carry a UL TC-ER listing slash installation costs, even over AWM Resources: Lapp USA, www.lappusa.com NFPA 79 Standard, bit.ly/Rbblbv UL Wire and cable flammability testing, bit ly/TxHTv2 For a white paper on the NFPA 79 electrical code, scan this code or go to: http://machinedesign com/whitepaper/ understanding-theelectrical-code-to-becompliant-0501 48 MACHINE DESIGN.com If you find electrical safety standards confusing, you’re not alone Many machine builders recently grappled with an ambiguous round of changes to NFPA-79 This is the National Fire Protection Association code that outlines electrical standards for industrial machinery that protects operators, equipment, and facilities from fire and electrical hazards NFPA-79 is cited extensively in the National Electrical Code (NEC) that governs the electrical wiring of industrial machines The standard cuts a broad swath across the industrial machinery landscape It applies to a comprehensive range of machines — everything from machine tools and injection-molding presses to testing machines and packaging lines It encompasses all of a machine’s electrical and electronic elements operating at 600 V or less This means that a vast majority of machine power, control, and lighting circuits fall under the scope of NFPA-79 Machine builders complied with the dictates of NFPA-79 for years But earlier this year the standard underwent revisions that make it more difficult to specify compliant electrical cabling Appliance wire OK’d The key change to NFPA-79 for 2012 involves the ability to use appliance wiring material (AWM), which had been banned since 2007 AWM can be an economical wiring choice compared to higher-performing UL-listed machinetool wire (MTW) But there were several sound reasons behind the AWM ban For one, some contractors were using AWM incorrectly as part of the building infrastructure The NEC does not recognize AWM for this type of use Also, not all AWM products are created equal when it comes to the quality of their insulation layer The insulation thickness of low-quality commodity cabling varied such that the wire, while meeting its electrical insulation requirements, was not sufficiently flame resistant for use in industrial machines It’s important to stress that not all AWM suffers from these quality issues Lapp and other reputable cable manufacturers can and produce AWM products whose insulation wall thickness is both consistent and adequate for the voltage rating of the cable High-quality AWM can pass the specified vertical flame tests (FT 1) and can safely be used in industrial machines Keep in mind, however, that AWM lacks the extra layers of PVC-nylon insulation found in NOVEMBER 22, 2012 AWM and NFPA compliance A Krones technician documents the use of AWM in compliance with NFPA-79 One company successfully navigating the shoals of the recent NFPA-79 revisions is Krones Inc., Franklin, Wis., a manufacturer and integrator of packaging lines for food and beverage companies The company’s engineering team recently found that compliant AWM usage does require a bit of extra effort compared to the automatic compliance found with UL-listed MTW “Whenever you must implement changes because of an electrical-code change, there’s definitely an engineering-labor factor,” says Mike Nelson, the Krones engineer charged with NFPA-79 compliance Some of that engineering labor went into researching specific AWM products to see whether they meet the compliance restrictions Even proper jacket labeling doesn’t answer every compliance question regarding AWM “You can’t tell whether a product complies just by looking at the cable,” says Nelson And even more engineering labor went to NFPA-79’s documentation requirements In all, Nelson estimates that Krones has spent more than 150 engineering man-hours complying with the requirements related to AWM use And that figure represents just the work done to formulate a compliance strategy It does not include the technical documentation and drawing changes needed to incorporate the wire into each and every machine MTW This extra insulation allows some types of MTW to NFPA restrictions In the case of extremely large machines pass flame tests (FT 4) more rigorous than those for even such as bottling lines, machine builders and installation the best AWM contractors can spend dozens of engineering hours and Reversing the AWM ban reflected the realities of the thousands of dollars complying with the documentation global machinery marketplace in which AWM remains a requirements widely used cabling choice The restrictions imposed by These documentation needs, while not insurmountthe new NFPA standard attempts to negate the potential able, must be factored into the cost of wiring the machine drawbacks of AWM In some cases, the added documentation costs can erode The first restriction states that the AWM must be identhe minor price advantages of some AWM cables tified as suitable for the application at hand and must be One way around the concern of documentation is to used in accordance with the machine-manufacturer’s infavor listed MTW Because it inherently complies with structions Other restrictions detail cable construction inNFPA-79, MTW cabling alleviates the documentation cluding minimum conductor count, flame resistance, and requirement and eliminates any residual confusion over wall thickness Compliant AWM cable must carry a jacket whether a given AWM product is approved and properly print legend that spells out the AWM style number, voltlabeled MTW also has a host of technical advantages that age, temperature rating, and flame rating derive from its superior flexibility and resistance to flame, The reversal on AWM usage also requires more documentation For exampl e, m anu f a c tu re rs Certain UL-listed cables meet exposed Another change in the 2012 NFPAmust provide field-instalrun (-ER) specifications, which provide an 79 standard allows exposed cable runs lation information related additional level of protection for these along the structure of the equipment or to the AWM wire with types of applications Cables meeting -ER in the machine chassis As long as the exeach machine’s technical requirements are subjected to the same posed cables closely follow the surface documentation Exposed cable runs for fast installation Easy compliance Given all the cable runs on and around today’s complex industrial machines, the need to c ument AWM usage for each and every machine represents the most onerous of all the and structural members of the machine, the installation does not require conduit, raceways, or any special hardware Thanks to reductions in installation time and labor, exposed cable runs can reduce costs dramatically compared to traditional installation methods that need conduit or special mounting hardware crush and impact tests as armored-type or metal-clad (MC) cables, that lets cables leave the machine area and enter a cable tray without conduit Keep in mind, though, that not all ULlisted cables meet NFPA requirements, especially lower-priced commodity and rigid products NOVEMBER 22, 2012 MACHINE DESIGN.com 49 ELECTRICAL/ELECTRONIC TECHNOLOGY GUIDE Common electrical-compliance questions With both UL requirements and NFPA standards holding sway over different aspects of electrical compliance, it’s always been tough to figure out whether a given cable choice will pass regulatory muster The job of picking compliant cables recently became even tougher when the latest version of NFPA 79, the main standard governing the electrical safety of industrial machines, drastically changed the compliance picture Here are some of the most commonly asked compliance questions and answers: Is NFPA-79 a law? No NFPA-79 is the key electrical safety standard accepted by machine builders, installers, and buyers in the U. S It is also used as a reference by the National Electric Code Must a machine comply with NFPA-79? In most cases, yes The need for NFPA compliance ultimately depends on the application details and whether the machine is being installed in a building When in doubt, it’s a good idea to comply with NFPA-79 to maximize safety and avoid potential litigation Will machine builders and buyers standardize on the new edition of NFPA-79? Yes Concerns about safety and liability issues will force compliance with the new 2012 edition of the NFPA standard Buyers of industrial equipment are unlikely to purchase noncompliant machines that could increase the potential for litigation Who decides which cables can be installed in the field? Engineers may assume that UL dictates cable choice, but the real authority falls with electrical inspectors who deter- oil, chemicals, and mechanical stresses Some MTW products carry a UL TC listing for use in tray cables and may be rated for use in exposed runs These broadly certified MTW cables adapt to the widest range of application requirements, and their use in exposed runs can slash installation costs MTW’s technical edge notwithstanding, there are times when AWM may be the best choice For example, AWM may win out in overseas markets for supplychain reasons If you go with AWM, make sure the product you buy is of a high quality designed to withstand all of the abuse found in an industrial environment Most importantly, buy only from reputable suppliers that can help you comply with the complex labeling, documentation, and application hurdles imposed by NFPA-79 MD 50 MACHINE DESIGN.com mine compliance with the National Electrical Code However, UL does control the electrical, physical, and environmental-testing requirements and approvals that, in practice, determine cable usage in the field Are UL listed cables always allowed for use on a machine? Not necessarily There are machines that use UL-listed cordage incorrectly For example, some listed cables are only intended for temporary applications Other listed cables may not meet the minimum stranding requirements needed for NFPA-79 compliance What’s special about MTW approval? Machine-tool-wire (MTW) approval requires that the cable be flexible and offer a high degree of mechanical durability These qualities let it perform under the challenging conditions surrounding industrial machines Are all MTW cables oil resistant? Yes, all compliant MTW cables minimally meet the requirements of the UL Oil Res I test For applications requiring more-severe exposure, the more-rigorous Oil Res II test is also a permitted option Can I run MTW cable into building infrastructure? No, not unless it is dual marked with the appropriate UL Listing Cables marked “TC” offer the high flammability rating needed for installation in building infrastructure The MTW requirements mandate that a cable only meet the minimal flame test known as VW–1 Can cables be left exposed when going from the machine to the cable tray? In most cases, no Cables designed for exposed runs must have “TC-ER” approval Communication cables, tray cables, and exposed-run applications NEC-336, 392, 501, AND 800 NFPA-79 — Machinery area Cordage NEC-400 This diagram shows where the different wire classes apply for plant and machine wiring as detailed by the NEC and NFPA-79 code NOVEMBER 22, 2012 NFPA-79 — UL MTW or AWM ORR ON ENGINEERING The death of e-mail? People are already rejecting e-mail as their main form of communication in their social lives and are starting to so at work What does this mean for engineering organizations and why should you care? Consider the twenty-something now entering the workforce who mostly communicate via Facebook, Twitter, and text messaging They are why engineering organizations should introduce software such as Yammer, Jive, or Tibbr These “enterprise social systems” provide companies with a better way to communicate than the point-to-point networks of e-mail Engineers don’t have to search e-mail and sort through a swamp of irrelevant information Yammer and Jive still allow person-to-person communications and all the features users look for in e-mail But everything happens inside the enterprise firewall Enterprise social systems are thus more secure than e-mail The applications also make it more clear that the contents of your communications belong to the company and can be accessed by management Of course, this is true of corporate e-mail, though that may not be obvious to everyone Yammer is said to let users collaboratively create, edit, and publish content with coworkers right from a browser Users can display team goals, compile notes, and draft documents together online, viewing character-by-character changes in real time as others make edits to a page Jive is said to let users follow people, projects, and content critical to their jobs And Jive doesn’t flood them with irrelevant updates It’s smart enough to pick out just what you really need to know Away from your computer? You can access all your Jive conversations and colleagues from a smartphone or tablet Browsing the Web? Jive brings social collaboration to every Web site and app Using Microsoft Office or Outlook? Jive lets users share, collaborate, and participate from these familiar programs Lastly, Tibbr is said to let users filter and organize information to match the way they work Most engineers use about nine different applications a day, making it hard to find just the right piece of information to comResources: plete a task Tibbr helps Joel Orr, Copywriter, www users boil everything joelwritescopy.com down by letting them, (650) 336-3937 say, approve expense Edited by Leslie Gordon, reports or order more leslie.gordon@penton.com, Twitter @ inventory LeslieGordon — Joel Orr THE RIGHT ENCLOSURE AT THE RIGHT TIME Excelerate gives you three ways to get the broadest range of enclosure solutions on your terms and at the speed you need to make every project a success STANDARD ENCLOSURES—Access more than 12,000 standard products immediately available through our extensive distribution network DESIGN YOUR STANDARD—Modify a standard enclosure to satisfy unique project requirements ENGINEERED SOLUTIONS—Customize a solution to meet more complex project needs To learn more about Excelerate call 800-827-3291 or visit www.hoffmanonline.com/excelerate RS# 130 NOVEMBER 22, 2012 MACHINE DESIGN.com 51 SOFTWARE REVIEW SolidWorks 2013 makes 3D modeling easier 30 New Models 20 Stainless Steel Models 286 New Stroke Lengths New GST Tandem Gas Spring Model Features/Benefits include: · Removes “muscle power” for lifting lids, hoods, hatches, machine guards, and more · Stainless steel models available · Push & pull types · Variety of end fittings for ease of installation · Exclusive customer application support · High quality construction - long service life · Maintenance free Applications: Aerospace, Agriculture, Amusement Rides, Automation, Cargo Doors, Conveyors, Engine Covers, Fitness Equipment, Furniture, Gurney Beds, Marine, Medical, Military, Packaging and more Scan QR Code to Visit ACE Web Site New 60 page catalog available! )DUPLQJWRQ+LOOV0, WHO ID[ HPDLO VKRFNV#DFHFRQWUROVFRP ZZZDFHFRQWUROVFRP 52 RS# 131 MACHINE DESIGN.com Every year, software companies introduce new versions, promising new features and exciting improvements SolidWorks 2013 upholds this tradition In addition, you may have heard rumblings about features that users have been wanting for years SolidWorks is at least listening By selecting faces, For example, it’s a noedges, or corners on brainer for big companies the View Selector, to keep up with constant users can look software updates, even at models from though this is an expendifferent angles more easily than sive proposition But for ever before small businesses, it’s a different story So what they do? They don’t upgrade isometric view, but how about getevery version But then these small ting a reverse isometric view? The shops get files they can’t open or new version lets users orient modthey get dumb solids through a els quickly and easily The nice part translator is that you can save views to use in To address this issue, users have other documents You can also add begged SolidWorks to act more more than one exploded view to like Microsoft Word, which has a a configuration And you can copy downloadable compatibility packand paste exploded views age that opens newer versions In another example, building an Until now, SolidWorks has steadassembly could get pretty tedious fastly refused to provide this capain previous versions of SolidWorks bility But SolidWorks 2013 at least If users didn’t pin the dialog, they works with previous releases This would have to restart the Insert means that from this release on, Component command each and if you have service pack of a reevery time they wanted to insert lease, you will be able to read the something Even when users very next version’s files You won’t pinned the dialog, they could only be able to much with them You insert one component at a time can add to them and subtract from SolidWorks 2013 lets users select them But you won’t be able to dimultiple components and insert rectly access the feature tree It’s a them all at once Users can even nod to what users want and better select multiple components and than nothing place them sequentially These caThat said, other improvements pabilities are great timesavers to the software make modeling And a nice enhancement is the easier You’ve been able to save center-of-mass (COM) point It is user-defined views for a long time reference geometry that tells you by right-clicking in the graphics at a glance where your assembly’s area and selecting the telescope balance point will be And it’s live icon But you had to rotate or It updates with any changes to otherwise orient the model, an the model That’s good for people inaccurate process You have an making devices that must be NOVEMBER 22, 2012 Edited by Leslie Gordon leslie.gordon@penton.com, Twitter @ LeslieGordon Resources: Mike Hudspeth is a designer with more than two decades of experience, a lifelong artist, and an avid model builder The software comes from Dassault Systèmes SolidWorks Corp., www.solidworks.com RS# 426 balanced like swords, guidance systems, and even tennis racquets Users can even mate to the COM of a component in an assembly (but, interestingly, not to the COM of the assembly itself ) Another enhancement: The Replace Component command lets users replace a component with another of the same name and type from another folder SolidWorks hasn’t previously let users that This will be well received by designers who have had to update models from, say, outside vendors Unfortunately, the capability to replace a component with a different type of component is not yet available Why would users want to that? There are times when a subassembly must be replaced with a single part or vice versa SolidWorks lets you go through all of the steps to select and confirm a replacement but then it tells you, “You can’t that.” The new version does lets users create swept cut features in assemblies and then propagate them to the component part files In addition, users can now control models’ materials via a design table You’ve been able to configure dimensions and color but not materials until now Say you’re a bullet manufacturer, for example, with special clientele Each customer wants 45 bullets, but one wants them in lead, one wants steel, and one wants silver Now you can that Other helpful new features: SolidWorks 2013 lets users add new dimensions to an existing set of baseline dimensions Previously, users had to add a new set Now they can right-click an existing set and pick Add To Baseline When the cursor changes, users select any new items they want dimensioned It couldn’t be much easier Another new feature I like is the ability to import and link tolerance and precision data from the model onto the drawing So when users change the value in a model, the drawing updates Users can even specify that they want to import only dimensions that have tolerances Slick! Last, when Autodesk purchased MoldFlow, injection-molding analysis ceased to be part of SolidWorks That has been an annoyingly large gap in the software Third-party applications attempt to fill the need, but nothing works in SolidWorks Fortunately, Version 2013 fills the gap with SolidWorks Plastics I am told there will likely be a pared down “Plastics Xpress” included for free in future versions — Mike Hudspeth The World’s Fastest, Most Accurate Waterjet Driven by Nexen The Nexen Roller Pinion System makes the new Flow Mach Waterjet cut faster with unrivaled precision Get the same competitive advantage for your machines with speeds up to 36 ft/sec and accuracy to ±0.00118" with zero backlash and less maintenance This amazing system is also extremely quiet, 99% efficient, and can be any length Beat your competition by overcoming the speed, accuracy, load and noise limitations of rack and pinion, ball screw and belt drive technologies Seeing is believing—request a free demo today! Learn more at www.nexengroup.com Call 800.843.7445 RS# 132 SPOTLIGHT ADHESIVES & FASTENERS Ceramic fasteners Standoff fasteners A range of ceramic nuts, bolts, and washers handle applications where high temperature, high voltages, magnetism, or harsh conditions limit or prohibit the use of other materials The high-purity, fully dense, and impervious fasteners are suitable for use in scientific and industrial applications where the nonoutgassing properties of the material are beneficial Standard products includes alumina hexagonal head bolts in metric sizes from M2 to M8, along with their matching nuts and washers Goodfellow Corp., 125 Hookstown Grade Rd., Coraopolis, PA 15108, (800) 821-2870, www.goodfellow-ceramics.com RS# 446 PEM unthreaded Keyhole and Snap-Top standoff fasteners mount and detach PC boards, panels, or components without tools or hardware Both fasteners provide secure and reliable attachment, reduce or eliminate the risk of loose hardware damaging internal circuitry, and allow “screwless” designs of subassemblies Keyhole Type SKC stainless-steel self-clinching standoffs let PC boards or panels be slipped quickly into place and removed from an assembly by simply sliding the board sideways and lifting it off Use with a single threaded standoff further improves security Snap-Top Types SSA, SSS, and SSC aluminum, steel, and stainless-steel standoffs clinch into metal sheets and Type KSSB brass standoffs broach into PC boards The fasteners use a spring action to hold boards and panels securely, while allowing quick attachment and removal using a simple snap-on/snap-off operation All install permanently in sheets or panels as thin as 0.040 in./1 mm by squeezing them into a properly sized hole PennEngineering, 5190 OId Easton Rd., Danboro, PA 18916, (800) 237-4736, www.pemnet.com RS# 448 Closures The new Press-LOK closures feature hookto-hook technology that lets the hooks engage without precise line-up, securing closure with great burst strength to maintain package integrity The closures are both “touch” and “press” activated Additional benefits include heat sealable to most PE flexible films; audible click — hear it open and close; low profile, transparent design; and consumer friendly — easy to open and close The transparent closures come in widths up to 6½ in., with or without adhesive The devices are available in multiple resins and hook heights Velcro USA Inc., 406 Brown Ave., Manchester, NH 03103, (800) 225-0180, www.velcro.com RS# 447 54 MACHINE DESIGN.com NOVEMBER 22, 2012 Adhesives Line of adhesives complements the Raychem brand of heat-shrinkable tubing, molded shapes, and wire and cable products The line includes two-part polyamide epoxy, twopart modified epoxy adhesive, chemical and heat-resistant adhesive, NBCCS (Nuclear, Biological, Chemical, Contamination, Survivable) adhesive, hot-melt thermoplastic adhesive tape, hot-melt adhesive tape, elastomeric adhesive tape, generalpurpose hot-melt sealant tape, and halogen-free hot-melt sealant tape TE Connectivity, 1050 Westlakes Dr., Berwyn, PA 19312, (800) 522-6752, www.te.com RS# 449 r formation via ou Request free in Web site at Reader Service c design.com/rs ww w.machine Optically clear adhesives Loctite Liquid Optically Clear Adhesives (LOCA) increase display durability, extend product life, reduce power consumption, and permit thinner device designs Dual-cure technologies provide full cure in shadowed areas, as well as reduced shrinkage that controls display distortion and eliminates mura When used on AR glass, the adhesives increase contrast ratio in sunlight by 400% and minimize the refractive index mismatch to glass and PMMA, minimizing light loss due to reflection Seven products make up the LOCA line, including two dual-cure adhesives designed to cure in shadowed areas where light cannot reach Loctite 5192T is a high-temperature-resistant, nonyellowing UV/moisture cure silicone that is dimensionally stable, minimizing stress to LCD surfaces, and reducing mura defects Loctite 3192T is a general-purpose UV/heat cure acrylic with a refractive index for excellent brightness, clarity, and color It heat cures in just at 80°C Designed for TP1 (touch panel to cover lens) and TP2 (cover lens to LCD) bonding, general-purpose Loctite 3196T is an impact-absorbent UV acrylic that protects the display surface from damage and can replace the air gap designed into TP2 applications UV-cure Loctite 3193T delivers high adhesion to plastic, while general-purpose Loctite 3195T is for TP1 glass-to-glass bonding Loctite 3195DMT is a high-viscosity dam material compatible with most UV acrylic LOCAs Loctite 5192DMT is a high-viscosity silicone dam material for use with Loctite 5192T UV/moisture-cure silicone LOCAs provide better adhesion and reliability than optically clear double-sided tapes, are more suitable to large panel assembly, and better for gap filling Henkel Corp., Engineering Adhesives, One Henkel Way, Rocky Hill, CT 06067, (800) 562-8483, www.henkelna.com/loca RS# 450 Vesconite Hilube Up to ten times the life of bronze ● ● ● No grease needed Ideal in dirt and underwater Small to XXL sizes 866 635 7596 vesconite.com RS# 133 NOVEMBER 22, 2012 RS# 134 MACHINE DESIGN.com 55 Moving Assembly Lines for the Heaviest Products PRODUCTS Roller and engineered chains Powered by Proven, Versatile Air Film Technology ` -PX$BQJUBM*OWFTUNFOU ` &MJNJOBUF$SBOFTBOE'PSL5SVDLT ` &OIBODF4BGFUZBOE1SPEVDUJWJUZ 800-888-0018 XXXBJSGMPBUDPN "JS#FBSJOH&RVJQNFOUt-JGU5JMU5BCMFTt5VSOUBCMFTt"TTFNCMZ-JOFT &SHPOPNJD&RVJQNFOUt5SBOTQPSUFSTt3JHHJOH&RVJQNFOU An extensive range of roller and engineered chains meet the demanding requirements of power-transmission and conveyor applications in the food and beverage, mining and cement, and steel industries, among others Transmission, or roller, chains with ¼ to 3-in pitch sizes feature through-hardened, shot-peened, and ballburnished inner and outer link plates with wide waist; case-hardened precision-ground pins; precision cold-rolled bushings; and through-hardened, shot-peened solid rollers, providing increased fatigue strength, higher resistance to damage from shock loads, maximum wear resistance, and extended service life The chains perform in –4 to 300°F (stainless-steel versions in –4 to 750°F) and can be supplied with rivet or cottered design Nonstainless types are prelubricated SKF USA Inc., 890 Forty Foot Rd., Lansdale, PA 19446, (267) 436-6693, www.skfusa.com RS# 466 RS# 147 WASHERS & STAMPINGS FREE CATALOG & BROCHURE Call 1-888-WASHERS tTBMFT!CPLFSTDPN t'"9 WWW.BOKERS.COM/MD RS# 135 56 MACHINE DESIGN.com NOVEMBER 22, 2012 RS# 136 r formation via ou Request free in Web site at ice rv Reader Se c design.com/rs ww w.machine See-through filter assembly See-through filter assemblies let users visually see the fluid or oil pumping through the filter to determine fluid condition and inspect the filter element and contaminants/ particles that have been filtered out of the fluid system Users can determine if the particles are from normal use or excessive wear of the bearings and components in the machinery or the engine supplying fluid to the filter assembly Inspection can be done without draining, leaking, or losing any fluid or oil, and without unbolting or loosening any fasteners or fittings The filter element comes in micron mesh and can be cleaned and reused Clear View Filtration, 7320 North Regal St., Spokane, WA 99217, (509) 467-7584, www.clearviewfiltration.com RS# 467 Programmable linearposition sensors The LS1 Series of noncontact linear position sensors are insensitive to magnetic fields and have no mechanical sensor track Models are available with and without a return spring The unit features programmable end-points that are set using pushbuttons on top of the sensor Programming is through a signal processor and two LED programming status indicators An output range can be programmed either the same as, or independent of, actual travel length by setting minimum and maximum output levels Current or voltage output levels can be programmed separately from position programming Key specifications include a 25 to 100-mm measurement range for the return spring version and 25 to 200 mm for rod-only version Resolution is to 0.05 % and repeatability to less than 0.05% Four output options are available: 0.1 to 10 V, to 20 mA, 10 to 0.1 V, and 20 to mA Sensor life is >100 million movements Novotechnik U.S Inc., 155 Northboro Rd., Southborough, MA 0177, (508) 485-2244, www.novotechnik RS# 468 com/ls1 RS# 137 DATA FILE LITERATURE ADVERTISING ader Service Access our Re ickly find and Website to qu ation on the rm fo request in d services foun products and ACHINE DESIGN M of s ge in the pa c design.com/rs w w w.machine New Shock Absorption and Vibration Dampening Catalog ACE’s SLAB product is designed to absorb shock loads and insulate vibrations for machines, crane rails, hydraulic crushers, presses, and more Reduce impact forces and noise Extend machine life Made of visco-elastic PUR materials and manufactured to a patented formula Available in a variety of densities, thicknesses and dimensions ACE Controls Inc Farmington Hills, MI (800) 521-3320 (248) 476-0213 Email: shocks@acecontrols.com www.acecontrols.com RS# 250 326,7$3( 7DSH([WHQVLRQ3RVLWLRQ6HQVRUV XWLOL]HWKHIXQFWLRQDOSULQFLSOHRIWKH &DEOH([WHQVLRQ3RVLWLRQ6HQVRUV &RQVWUXFWHGZLWKDVSHFLDOO\GHVLJQHGVWDLQOHVVVWHHO WDSHWKH\DUHSHUIHFWO\VXLWHGIRUDSSOLFDWLRQVWKDWUH TXLUHSXOOH\VGXHWRWLJKWORFDWLRQV $606HQVRUV,QF :*UDQG$YH8QLW (OPKXUVW,/86$ LQIR#DVPVHQVRUVFRP ZZZDVPVHQVRUVFRP RS# 251 RS# 252 B&B Electronics is a global source for rugged, reliable, edge-to-backbone wired and wireless networking New tutorials and podcasts on Learn Web site “What is a PLC” plus many more topics on industrial control products including new videos and podcasts on AutomationDirect’s free self-service learning site Visit http://learn.automationdirect.com to watch these and other tutorials on a range of industry topics New BEI Sensors Selection Guide Covers Products, Environments and Technology for Motion Control BEI Sensors’ product selection guide explains the fundamentals of various speed and position sensing technologies and how to choose which is best suited to a particular application BEI’s extensive line of rugged products include rotary encoders, rotary and linear potentiometers and rotary Hall effect sensors, all of which are displayed in easy-to-read charts that summarize the most critical specification criteria side-by-side Backed by strong technical support, B&B’s Ethernet, USB, Wireless and Serial solutions are known for being easy to use, easy to install and easy to order Contact: B&B Electronics Tel: 888.948.2248 Email: orders@bb-elec.com URL: http://www.bb-elec.com Download B&B’s latest white papers: http://bb-elec.com/technical_library.asp RS# 254 RS# 253 Clamps and Tooling Components 2013 Washers Catalog The complimentary 2013 Washer Catalog illustrates Boker’s 27,000 non-standard flat washer sizes, wide range of outside diameters, from 0.080” to 5.140”, variety of inside diameters and thicknesses, as well as its over 2,000 materials With its extensive selection and custom capabilities, Boker’s provides endless washer possibilities and manufactures solutions to your exact specifications ISO 9001:2008 Registered Carr Lane Mfg Co St Louis, MO www.carrlane.com RS# 256 Helical Products Co., Inc RS# 262 58 MACHINE Design.com r5VSOLFZTZTUFNTBWBJMBCMF XJUICBTFT EJBMQMBUFT TMJQ SJOHT SPUBSZVOJPOT BOENBOZ PUIFSGFBUVSFT%JBMEJBNFUFST PWFSXJUIDBQBDJUJFTJOUIF UFOTPGUIPVTBOETPGQPVOET r*EFBMGPSQBJOU DPBUJOH BTTFNCMZ JOTQFDUJPO BOENBOZPUIFSQSPDFTTFT r#VJMUUPZPVSFYBDUJOH CENTRICITY CORPORATION XXXDFOUSJDJUZOFUr TQFDJàDBUJPOT RS# 257 RS# 258 Multi-Purpose Pneumatic Tools Dunkermotor releases its 2012 Low Voltage Brushless DC and Intelligent Servo Motors catalog Expanded catalog includes specifications on custom configurable BLDC motors, controls, gearheads, brakes, encoders and accessories Available for complimentary download at Dunkermotor website or email request for hard copy Hand or bench models improve productivity Make plumbing assemblies; splice cable and wire rope; crimp, swage, stake, punch, pierce, flare, seal, emboss, and notch Fabco solves problems Let us help! Dunkermotor FABCO-AIR, Inc Email: info@dunkermotor.com Web: www.dunkermotor.com/2012_BLDC_catalog CPV Manufacturing Inc., Philadelphia, PA RS# 259 Helical’s 28-page catalog features miniature flexible couplings, u-joints, power transmission couplings and machine springs Quickreference, product summary chart highlights features and technical data Easy-to-use part number builders make ordering easy Visit: www.heli-cal.com r)JHIQSFDJTJPOQPTJUJPOJOH DPOUJOVPVTNPUJPO BOE SFDJQSPDBUJOHNPUJPO Brushless DC and Intelligent Servo Motors 20-page catalog (#74-H) describes these Mark VIII O-SEAL stainless steel tube fittings that will not shake loose Unique leakproof sealing system allows easy slip-in, slip-out connections matched to your system O.D tube sizes from 1/4” to 2” Reliable to 6,000 psi for liquids and gases Available in steel, bronze, monel, and titanium Call 888-2785449, Web: www.cpvmfg.com COUPLINGS, U-JOINTS and MACHINED SPRINGS r&YQMPTJPOQSPPG XBTIEPXO BOETFBMFEBJSQVSHFENPEFMT This 688-page, illustrated catalog includes toggle clamps, pins, hoist rings, knobs, modular fixturing, supports, jig and fixture bases, drill bushings and power workholding devices Full specs included Online version at carrlane.com www.bokers.com/mdds Stainless Steel Tube Fittings www.beisensors.com/guide RS# 255 HAZARDOUS LOCATION SERVO INDEXERS RS# 260 Get Your 2012/2013 Cable & Wire Catalog Today! 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Then the 2012/2013 HELUKABEL® Cables and Wires Catalog is a must have item for your office Inside the 2012/2013 Cables and Wires Catalog: • Spec Sheets for 30,000+ Line Items • Cable and Wire Selection Tables • Over 100 Pages of Cable and Wire Technical Information • Available in hard copy or on CD With the 2012/2013 Cables and Wires Catalog on your desk, the solution to your cable and wire problem is only an arm’s length away! 847-930-5118 cables@helukabel.com www.helukabel.com RS# 263 NOVEMBER 22, 2012 Gainesville, Florida RS# 261 914-(#56'4#0&$'66'4 2CEMGFYKVJGUUGPVKCNEJCTVU CPFVCDNGU 5RGGFUWRVJGUGNGEVKQPRTQEGUU 1HHGTUEQPEKUGDGUVRTCEVKEGU HQTOGEJCPKECNFGUKIP #.51 #8#+.#$.' #5 #0 '$11- 10.; (14 24+06 14 '$11- 8'45+10 999+0&7564+#.24'55%1/ +0(1"+0&7564+#.24'55%1/ RS# 264 [...]... fastening screw thread For a white paper on gearhead construction and use, scan this code or go to: http:// machinedesign.com/ whitepaper/gearheadconstruction-and-use-0911 16 MACHINE DESIGN.com NOVEMBER 22, 2012 r formation via ou Request free in Web site at ice Reader Serv c design.com/rs ww w .machine COMPLETE ENGINEERING SOLUTIONS Start here "The navigation and ordering process are easy to work Thanks."... *RWRZZZSHPQHWFRPDQGVHOHFWWKHSURGXFWOLWHUDWXUHWDE WRYLHZPLFUR3(0706HOI&OLQFKLQJ7DFN3LQ70EXOOHWLQ Standoffs/spacers Inserts for plastics Low profile head screws 70 YEARS OF EXCELLENCE www.pemnet.com 1942 -2012 RS# 110 382R 2012 LETTERS Anyone for ethics? Unfortunately, ethics went out the window in the U. S many years ago with the advent of our “instant” society (“Where Did Ethics Go?” Sept 6) Everyone wants everything... tan Since then, the mileage has been 14.5 to 15 mpg, which is an 11 to 15% improvement This might be an isolated case, but it seems a rigorous test needs to be done Erik A Larsen TM 14 MACHINE DESIGN.com NOVEMBER 22, 2012 RS# 112 A n atomy of the HUCK 360 ® ® PROBLEM: CONVENTIONAL THREAD BOLT NUT TRANSVERSE VIBRATION TRANSVERS E V I BRATION COMPARISON Gap between the threads allows for transverse movement... Power Transmission Products 38 River Road, Uxbridge, MA 01569 Tel: 508-278-2422 • Fax: 800-346-0018 • 800-648-7725 www.mitrpak.com 10 Lindsey Frick Kenneth J Korane MACHINE DESIGN.com 1300 E 9th St Cleveland, OH 44114-1503 NOVEMBER 22, 2012 TM micro fasteners Ideal for today’s compact electronics f*DPLQJ+DQG+HOG'HYLFHVf1RWHERRNV f&HOO6PDUW3KRQHVf7DEOHW&RPSXWHUV 1(: 7RVHHRXUFRPSOHWHOLQHRIPLFUR3(0IDVWHQHUV... from –4 to 212°F The vent takes up no space inside enclosures and its low-profile exterior portion reduces the risk of damage from technicians who service the enclosure RS# 402 18 RS# 115 MACHINE DESIGN.com NOVEMBER 22, 2012 Liquid and particles kept out Polyester backing Polypropylene housing Air and gas molecules pass in and out through the membrane ePTFE membrane RS# 116 NEW ZIP TIE MOUNTING BRACKET... by students at Virginia Tech University to race in the TTXGP Its 7.5-kW-hr battery pack powers a Kollmorgen permanent-magnet motor, which gives the bike a top speed in excess of 100 mph NOVEMBER 22, 2012 MACHINE DESIGN.com 21 REPORTER’S NOTEBOOK Navy tries turning seawater into fuel Engineers at the U. 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