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Welcome back! This month we lead off with an article on cast copper
rotors and the role these rotors can play to help meet the tough new
NEMA Premium standards. Then we'll take a look at two different designs
for linear actuator design, one using voice coil operation while the
other a more conventional linear motor design, that's said to provide
better control over positioning, speed, and force than pneumatic and
hydraulic actuators. The voice-coil actuator even claims to withstand 10
billion cycles.
Motor protection is just as important as the motor itself, so torque
limiters help prevent overloads that may cause damage from being
reflected back into the motor.
Our featured video looks at ac and dc motors as used on pumps and
compressors, while a new 145-page catalog details a line of motion
components and peripherals, including motors and actuators. And we wind
up this issue with our usual assortment of new products.
-- Robert Repas, Assoc.
Editor
Get Connected! Come join the discussion on MACHINE DESIGN's Blogs, LinkedIn,
Twitter, and Facebook
accounts, or visit the virtual MD
Office in Second Life.
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The stringent levels spelled out in NEMA Premium tables have
fostered a lot of interest in motor architectures that can deliver high
efficiency. One of those architectures uses a rotor cast from copper.
Today three motor makers, FAVI S.A. in France, SEW Eurodrive GmbH, and
Siemens Energy and Automation Inc., all make copper-rotor designs.
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The linear voice-coil actuator is said to provide better
positioning, speed, and force control than pneumatic and hydraulic
actuators. It features a self-aligning coil, which means customers do
not need to provide bearings, making it easy to mount. In fact,
actuators with surface-finished linear bearings have been customer
tested and found durable enough to withstand 10 billion cycles.
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Linear motors offer precise positioning and highly dynamic response
for many motion-control tasks. For machine tools, these include not only
rapid traverse, but slow, constant-speed movement of machine heads,
spindle slides, tool-management systems, and part-handling devices,
according to officials at Siemens Energy & Automation, Motion Control
Business, Elk Grove Village, Ill.
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The ST1 torque limiter protects gearboxes and pumps from torque
overloads, and comes in four models. The compact design lets the users
add three, six, or nine overload modules that set breakaway torque from
740 to 118,000 lb-ft.
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Eric Wilson from KNF Neuberger gives Lee Teschler of MACHINE DESIGN
the low down on ac and dc motors used with pumps and compressors. 7:37
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A new 145 page catalog covers motion systems products and
peripherals. The catalog has eight product sections detail SmartMotor
specifications, fieldbus protocols, brake options, connectivity,
peripherals, power supplies, gearheads, and software.
Animatics Corp.
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The Pacesetter line now includes over twenty new 230 to 460-Vac,
variable speed, three-phase gearmotors and motors. The 34R and 42R frame
motors have dual voltage windings and inverter-duty ratings. When used
with an ac speed control (inverter), the motors have a 120 to 3,650 rpm
speed range; 281-oz-in. (2-Nm) maximum torque, and are rated from 1/4 to
3/8 hp.
Bodine Electric Co.
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The Uniplace 2300/2400 handling system is a cartesian-arm system
with a 1,000 × 400 × 240-mm working area. Its precise integrated
distance-measurement system, with a resolution of 8 μm, allows a repeat
accuracy of ±0.05 mm.
Schunk Inc.
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Check Out the New EET Website
Are you looking for more information on energy efficiency? EETweb.com
features the latest efficiency updates, information on the basics of
energy efficiency and products available for energy efficient designs.
Click here to
visit the site and learn more!
Machine Design Video Spotlight
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Learn more about Proto
Labs |
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See how Proto Labs, through its First
Cut and Protomold services, provides new product designers and engineers
with the easiest, fastest and least-expensive way to obtain real parts,
really fast. |
Now Available On-Demand
The Energy Efficiency Web Conference & Expo
Engineers saw and heard great educational content at the Energy
Efficiency Web Conference and Expo. If you missed the live virtual
event, don’t despair! An archive of the full day’s agenda is now
available.
Design engineers are required to integrate energy efficiency into their
designs while maintaining lower costs, the highest reliability or both.
The editors of Machine Design understand these challenges
and have developed this conference to help engineers understand the
recently imposed energy mandates. The information presented at this
educational event will help engineers compare the different technologies
and product related to energy efficiency. Attendees will gain access to
the technical information needed to help them make the best decisions
without having to travel or take time away from current projects.
Visit the archive to:
- View informative webinars on energy efficiency
- Visit interactive booths where you can contact suppliers
- Peruse the Resource Center where you can download or link to
additional pertinent energy efficiency information
Register Now!
UPCOMING WEBCASTS
Optimizing Mechatronic Systems Using Simulation
Sponsored by The MathWorks
DATE: September 10th, 2009
TIME: 2:00pm ET/11am PT
Are you encountering integration errors in mechatronic systems late in
development during hardware prototyping?
Simulating mechatronic
systems in one environment that combines mechanical, electrical, and
control system modeling makes it easier to find performance errors early
in your development process. In addition, current simulation technology
allows integration of engineering data from different CAE tools, such as
CAD and EDA, reducing translation errors.
Attend this live webcast and learn how simulation can help you:
- Build multidomain mechatronic system models
- Predict and optimize system performance
- Understand and manage complex system interactions
- Detect design inefficiencies and integration errors during
development
- Verify and test mechatronic systems before building hardware
prototypes
Click here learn more and to register!
How to Select the Right Dispense Valve
Sponsored by EFD
DATE: September 17th, 2009
TIME: 2:00pm ET/11am PT
This webinar will provide an overview of the different types of dispense
valves and review criteria for matching valves to specific fluids and
applications.
Topics will include:
- Common types of assembly fluids
- Fluid/valve compatibility
- Matching the valve to the application
- Choosing a fluid reservoir
- Benefits of using a dedicated valve controller
Click here learn more and to register!
ARCHIVED WEBCASTS AVAILABLE FOR FREE VIEWING
Click
Here for a list of archived Machine Design webcasts.
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Contact Information
Editorial questions: Robert Repas
216-931-9319
Advertising/sponsorship opportunities: Virginia Goulding
216-931-9893
Machine Design
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