PowerAcT trapezoidal screws from Nook Industries have
centralizing threads that maintain alignment of the
thread axis. The screws are manufactured in accordance
with ISO standards. "We are finding more customers designing
with global sales in mind, so they are asking for metrics,"
says Rick Christyson, chief engineer at Nook. The company
offers eight sizes from 10 to 65 mm. The screws are
accurate to within ±0.1 mm per 300-mm lead. "The screw's
threads are made with a 30º angle. We make the nuts
to match, so there is no wedging or binding. Keeping
the tolerances tight also lowers the friction and extends
the life of the products," says Christyson. Plastic
and bronze nuts are matched with screw capacities. Customers
choose trapezoidal screws made from stainless steel
for food and medical applications or high-carbon 4140
alloy steel for machine tool, packaging, and other industrial
applications. PowerAc screws are compatible with the
company's EZZE-MOUNTT bearing supports for 16-, 20-,
26-, 40-, 55-, and 65-mm universal face/foot-mount bearing
supports and 16-, 20-, 26-, 40-, and 55-mm flange-mount
Robots that walk have come a long way from simple barebones walking machines or pairs of legs without an upper body and head. Much of the research these days focuses on making more humanoid robots. But they are not all created equal.
The IEEE Computer Society has named the top 10 trends for 2014. You can expect the convergence of cloud computing and mobile devices, advances in health care data and devices, as well as privacy issues in social media to make the headlines. And 3D printing came out of nowhere to make a big splash.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.