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Motion Control Guide News For November 2013

Posted: November 25, 2013
Hinged-shaped safety switches in stainless steel HX series
HX series stainless steel safety switches are available both with mechanical and electronic contact blocks. Photo by pizzato elettrica
HX series stainless steel safety switches are available both with mechanical and electronic contact blocks.Photo by pizzato elettrica
Pizzato Elettrica has recently introduced its new HX series stainless steel safety hinged switches.
Thanks to the use of AISI 316L stainless steel and to the accurate surface finish, this new range of devices is suitable for any environment where particular attention is required for cleanliness and hygiene (i.e. pharmaceutical sectors, chemical or marine sector).
These are the main features of the HX series:
- AISI 316L stainless steel housing
- protection degree IP67 and IP69K
- intervention point 1.5° adjustable ± 1°
- versions with rear cable and rear cable with M12 connector
- laser marking on the product.
HX series stainless steel safety switches are available both with mechanical and electronic contact blocks.
MECHANICAL CONTACT BLOCK VERSIONS
Two versions of the stainless steel safety switches with mechanical contacts are available.
- 2NO+2NC, slow action closer with positive opening
- 2NO+2NC, slow action overlapped with positive opening
ELECTRONIC CONTACT BLOCK VERSIONS
One version of the HX series switches with electronic contact block is available with the following features:
- 2 safety outputs PNP, 1 auxiliary output PNP, 2 safety inputs PNP.
- possible connection in series of several hinged-shaped safety switches: the redundant internal structure of the HX hinged safety switch meets the characteristics required by the EN ISO 13489-1 and IEC 62061 standards, therefore the actual switch can be classified as a device of category 4, PL e and SIL 3. HX hinged switches can be used in series, while maintaining the PL e, as long as they are connected to an appropriate Pizzato Elettrica safety module controlling the correct functioning.
- 4 status-indicator LEDs: the version with electronic contacts in the HX series is provided with 4 LEDs which make it possible to quickly identify the status it is found in. Each LED is assigned a specific signaling function which makes it possible to immediately identify any wiring errors or circuit breaks. This avoids the need to decode troublesome blinking sequences in order to identify specific system faults.
For further information, please visit: www.pizzato.com
Hinged shaped safety switches in stainless steel HX series








National Instruments Named Among the World’s Top 10 Best Multinational Workplaces

For the third consecutive year, the Great Place to Work® Institute has ranked National Instruments among the top 25 multinational companies to work for in the world. This year’s “World’s Best Multinational Workplaces” list ranks NI at number nine. This honor is a testament to NI’s commitment to creating exceptional workplaces worldwide. “NI’s long-term management approach, known as the 100-year plan, recognizes that our employee contributions directly impact our key stakeholders’ success and are critical to NI’s overall growth, creating a great work environment and developing rewarding careers for our employees,” said Dr. James Truchard, CEO, president and cofounder of National Instruments. FORTUNE has named NI among the nation’s “100 Best Companies to Work For” for the past 14 years and the Great Place to Work Institute has recognized NI branches including China, Costa Rica, France, Germany, Italy, Japan, Mexico and the U.K. NI employees make products that accelerate productivity, innovation and discovery for engineers and scientists solving the world’s grand challenges. Because of NI employees’ work building the tools of scientific discovery, customers are working to break the world land speed record, monitor smart grids more efficiently and launch rockets into space. “Our employees are our greatest competitive differentiator,” said Mark Finger, vice president of human resources at National Instruments. “Repeatedly receiving this type of recognition both globally and nationally reinforces our commitment to creating meaningful jobs and careers for our employees. ”As NI has grown to over 7,000 employees in almost 50 countries, the company’s culture has spread beyond Austin headquarters to each oof the branch offices. NI invests in its people and is committed to being a stable employer despite trying economic times.
Nation Instruments





Sharp May Sell LCD Panels to New Manufacturers, Not Just Apple
Fri, 11/22/2013 - 12:46pm
The Associated Press
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Struggling electronics maker Sharp Corp. is considering supplying liquid crystal display panels that are now made at its Kameyama plant in central Japan specifically for Apple Inc. to other manufacturers including a Chinese firm, sources close to the matter said Friday.

The Osaka-based company currently produces LCD panels for Apple's iPhone 5s and iPhone 5c smartphones at its Kameyama Plant No. 1, but it is seeking to diversify its customer base for the panels due to uncertainty about how long the popularity of the new handsets will last, the sources said.

In order to procure LCD panels stably for iPhones, the U.S. technology giant has invested a little less than 100 billion yen in the plant, with the operating rate of around 80 percent currently, according to the sources.

Sharp has been holding talks with Apple to obtain understanding over diversifying its supply destinations, the sources said.



Motorola, 3D Systems Partner on Device Customization Plan
Fri, 11/22/2013 - 11:47am
Andrew Berg, Wireless Week
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Google's Motorola Mobility unit and 3D Systems have come to an agreement that could change the way mobile phones are manufactured.

According to a press release, the two companies have entered into a multi-year development agreement to create a continuous high-speed 3D printing production platform and fulfilment system in support of Motorola’s Project Ara.

Project Ara aims to develop "highly-custom, modular smartphones that afford users the opportunity to make functional and aesthetic choices about their device."

Motorola recently launched the Moto X, which allows consumers to customize various aspects of the device, including color and homescreen, when they order via a website.

Regina Dugan, senior vice president and head of Motorola’s Advanced Technology & Projects group said Project Ara aims to scale customization.

"It requires technical advances in areas such as material strength and printing with conductive inks for antennas. And those advances must support production-level speeds and volumes, which is a natural partnership with 3D Systems," Dugan said in a statement.

As part of the agreement, 3D Systems plans to expand its multi-material printing capabilities, including conductive and functional materials. The company also said it had plans to combine additive and subtractive manufacturing methods, and deliver an integrated high-speed production platform.

Pending successful completion of the development phase, 3D Systems says it expects to manufacture 3D-printed Ara smartphone enclosures and modules as Motorola’s exclusive fulfillment partner.
Moto X



"What Hppens When Graphene Meets a Semiconductor!"


For all the promise of graphene as a material for next-generation electronics and quantum computing, scientists still don't know enough about this high-performance conductor to effectively control an electric current.

Graphene, a one-atom-thick layer of carbon, conducts electricity so efficiently that the electrons are difficult to control. And control will be necessary before this wonder material can be used to make nanoscale transistors or other devices.

A new study by a research group at the University of Wisconsin-Milwaukee (UWM) will help. The group has identified new characteristics of electron transport in a two-dimensional sheet of graphene layered on top of a semiconductor.

The researchers demonstrated that when electrons are rerouted at the interface of the graphene and its semiconducting substrate, they encounter what's known as a Schottky barrier. If it's deep enough, electrons don't pass, unless rectified by applying an electric field – a promising mechanism for turning a graphene-based device on and off.

The group also found, however, another feature of graphene that affects the height of the barrier. Intrinsic ripples form on graphene when it is placed on top of a semiconductor.

The research group, led by Lian Li and Michael Weinert, UWM professors of physics, and Li's graduate student Shivani Rajput, conducted their experiment with the semiconductor silicon carbide. The results were published in the Nov. 21 issue of Nature Communications.

The ripples are analogous to the waviness of a sheet of paper that has been wetted and then dried. Except in this case, notes Weinert, the thickness of the sheet is less than one nanometer (a billionth of a meter).

"Our study says that ripples affect the barrier height and even if there's a small variation in it, the results will be a large change in the electron transport," says Li.

The barrier needs to be the same height across the whole sheet in order to ensure that the current is either on or off, he adds.

"This is a cautionary tale," says Weinert, whose calculations provided the theoretical analysis. "If you're going to use graphene for electronics, you will encounter this phenomenon that you will have to engineer around."

With multiple conditions affecting the barrier, more work is necessary to determine which semiconductors would be best suited to use for engineering a transistor with graphene.

The work also presents opportunity. The ability to control the conditions impacting the barrier will allow conduction in three dimensions, rather than along a simple plane. This 3D conduction will be necessary for scientists to create more complicated nano-devices, says Weinert.




"Inrared Vision Lets Researchers See Through Multiple Layers of Graphene"


It’s not X-ray vision, but you could call it infrared vision.

A University at Buffalo-led research team has developed a technique for “seeing through” a stack of graphene sheets to identify and describe the electronic properties of each individual sheet — even when the sheets are covering each other up.

The method involves shooting a beam of infrared light at the stack, and measuring how the light wave's direction of oscillation changes as it bounces off the layers within.

To explain further: When a magnetic field is applied and increased, different types of graphene alter the direction of oscillation, or polarization, in different ways. A graphene layer stacked neatly on top of another will have a different effect on polarization than a graphene layer that is messily stacked.

“By measuring the polarization of reflected light from graphene in a magnetic field and using new analysis techniques, we have developed an ultrasensitive fingerprinting tool that is capable of identifying and characterizing different graphene multilayers,” said John Cerne, PhD, UB associate professor of physics, who led the project.

The technique allows the researchers to examine dozens of individual layers within a stack.

Graphene, a nanomaterial that consists of a single layer of carbon atoms, has generated huge interest due to its remarkable fundamental properties and technological applications. It’s lightweight but also one of the world’s strongest materials. So incredible are its characteristics that it garnered a Nobel Prize in Physics in 2010 for two scientists who pioneered its study.

Cerne’s new research looks at graphene’s electronic properties, which change as sheets of the material are stacked on top of one another. The findings appeared Nov. 5 in Scientific Reports, an online, open-access journal produced by the publishers of Nature.

Cerne’s collaborators included colleagues from UB and the U.S. Naval Research Laboratory.

So, why don’t all graphene layers affect the polarization of light the same way?

Cerne says the answer lies in the fact that different layers absorb and emit light in different ways.

The study showed that absorption and emission patterns change when a magnetic field is applied, which means that scientists can turn the polarization of light on and off either by applying a magnetic field to graphene layers or, more quickly, by applying a voltage that sends electrons flowing through the graphene.

“Applying a voltage would allow for fast modulation, which opens up the possibility for new optical devices using graphene for communications, imaging and signal processing,” said first author Chase T. Ellis, a former graduate research assistant at UB and current postdoctoral fellow at the Naval Research Laboratory.



Here is a cool video about Stepper Motors


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