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A new year brings a new edition of Motors Monthly to your inbox.
This month, stepmotor failures may require a more in-depth look to
prevent future breakdowns. Configruing drives sets its sight on an often
overlooked area, the components between the motor and the load. When one
servomotor can't handle the load, link two or more so they behave as one
with Servos in Harmony. And direct-drive linear actuators get that
linear servo feel without intervening hardware.
--Robert Repas, Assoc. Editor
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Those who use stepmotors know these motors are infamous for failure
or stalling just when they’re needed the most. It is easy to assume
the motor just went bad when this happens. However, a deeper look during
troubleshooting often exposes the real reason the motor failed and a
long-term solution that prevents future malfunctions.
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Do You Want Motors That Last 2X
Longer?
 WEG has developed a way
to make their motors last twice as long. By combining a WEG VFD with a
W21 NEMA Premium or High Efficiency motor, you can optimize motor flux
at low speeds to produce full torque, while reducing the temperature by
11%. This motor/drive combination doubles the life of the motor. For
more information, call 1-800-ASK-4WEG (275-4934)
or log onto www.weg.net. |
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The promulgation of automation has thrust many engineers into the
role of specifying drive parameters. So it can be useful to examine the
equations that describe how drives transform one form of mechanical
power into another. The key to many motion applications is in sizing the
drive components lying between the motor and load.
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Two servomotors drive a single shaft in what’s billed as the
world’s largest trim-in-place thermoforming machine. The thermoformer,
dubbed the FT14k, recently went to work for a company molding yogurt
cups at a 140 cups/cycle rate. It incorporates an all-electric
dual-action press designed to turn out cups, trays, or plates.
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Direct-drive linear servoactuators produce linear motion directly
rather than convert rotary motion to a linear displacement. As is the
case with rotary servomotors, the shedding of ball-screw mass, friction,
wear, cogging, resonance, and so forth gives direct-drive linear
actuators agility and lets them be easily controlled.
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This issue's Featured Web Content comes from the University of New
South Wales in Sidney, Australia. It uses animated gifs and schematics
to explain the physical principles of some of the different types of
electric motors, generators, alternators, linear motors, and
loudspeakers.
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The MotoRGS linear-slide assembly incorporates a Kerk Rapid Guide
Screw (RGS) linear slide and a Haydon Size-17 hybrid stepper motor. A
supportive integral mounting base offers positioning accuracy,
repeatability, and axial stiffness.
HaydonKerk Motion Solutions
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BX4 Brushless motor with Four-Pole
Power and reliable long service life
 What can the Faulhaber
BX4 Brushless motor with 4-pole technology do for your designs? From
aerospace to robotics to medical applications, the BX4 can deliver power
for a wide range of applications. Constructed with a modular design with
fewer parts and no adhesive bonded joints. Continuous torque up to 12.2
mNm combined with the 22F series gearhead torque increases to 1,500 mNm.
Click here for more info and video on the all new BX4 from
Faulhaber.
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The new Compumotor-brand Open Frame Stepper (OFS) microstepping
drives are an alternative to ac-powered step drives, especially for
less-demanding point-to-point applications. The drives feature
three-state, PWM, MOSFET H-Bridge technology, which allows 3.5-A peak
current/phase and handling of Size 11 through Size 34 stepmotors.
Parker Electromechanical Automation
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A new line of motion products include high-quality, low-cost dc step
drives, stepmotors, and integrated stepper motor and drives. The dc step
drives come with 5 or 10-A output and low-cost dc step drives with 2 or
3.5-A output.
Automation Systems Interconnect Inc.
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The VWDIR20 parallel-shaft ac gearmotor is available in eight
standard models. The gearmotor features 1/4-hp (186-W) 115-V, 60-Hz
split-phase operation and a phenolic high-speed gear for low noise and
steel gearing in subsequent stages, with ratios ranging from 14:1 to
286:1.
Bison Gear & Engineering Corp.
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IT'S SALARY SURVEY TIME!!
Find out how you stack up against your peers when it comes to income and
workload by taking a few minutes to fill out the 2009 Machine Design
salary survey. Your confidential response, and the replies of other
readers, will show where you fit in among other design professionals.
Results will be highlighted in our salary survey article in the April 23
issue. Respond to the survey at http://www.zoomerang.com by Friday, Feb 13 and
you're automatically entered into a prize drawing for a $100 American
Express gift card.
Machine Design Video Spotlight
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IAI's Energy Efficient
Solution: Green Automation |
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IAI America's Derrick Ellerman
discusses the Green Automation aspect of factory automation that is
becoming increasingly an important part in choosing a complete motion
control system. The electro-mechanical ROBO Cylinder is energy
efficient, which dramatically reduces running costs and offers complete
motion control solutions that have many advantages over pneumatic
systems. |
Check Out the New Machinedesign.com
Our newly redesigned web site still features the best content and
information for engineers provided by engineers but with these new great
features.
Multiple Path Navigation
Find content your way. Improved site navigation creates multiple ways to
find the content you are looking for.
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The search function has been highly improved and tested to provide the
most effective results for engineers.
Highlighted Resources
Looking for CAD drawings? Find them in our CAD Library.
Download whitepapers in the Whitepaper
Library. Valuable educational content is featured in the eBook
section. Check out the latest in editorial and sponsored video
in the Video
section.
UPCOMING WEBCASTS
Burton Snowboards Brings th eBest Designs to Market with the Help of
3D Printing
Sponsored by Objet
DATE: February 5th, 2009
TIME: 2:00pm ET/11am PT
Design and manufacturing companies are faced with ever increasing
competition. More innovative product designs and technology are
essential to successfully compete in today’s market.
Burton Snowboards has been the world’s leading snowboard company since
1977 and continues to set itself apart by quickly adapting to
snowboarding’s continuous progression. Burton’s latest bindings
innovation, Extra Sensory Technology is an example of this adaptation.
Fully developed, tested and delivered in 18 months, EST shattered
previous timelines by 6 months with the aid of in-house Rapid
Prototyping.
Join us as Burton Snowboard Senior Prototyping Specialist Ryan Larson
and Objet Senior Applications Engineer Neil Ranney team up for a webinar
that explores how Burton Snowboards uses rapid prototyping and 3D
printing to cut time and costs off new designs.
Click here to learn more and register!
ARCHIVED WEBCASTS AVAILABLE FOR FREE VIEWING
Click
Here for a list of archived Machine Design webcasts.
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LEESON's new SM2 Vector Series inverters deliver up to 200%
starting torque and control an Inverter rated motor down to 1Hz at full
output torque.
www.leeson.com
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Editorial questions: Robert Repas
216-931-9319
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216-931-9893
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