There are several ways to monitor loads in a press or punch inserting operation. Load washers, while somewhat insensitive to torque or other extraneous loads or moments, can have lower accuracy. Pancake load cells are more accurate but also much larger. A donut or thru-hole load cell offers reduced size with improved accuracy for these measurements.
Using metal foil strain gauge technology, FUTEK’s LTH300 miniature donut/thru-hole load cells address measurements from 50 to 1000 lb. Available in 17-4 stainless steel construction, the low profile (0.028-inch) units’ inner diameters range from 1/8 to 3/8-inch (3.40 to 9.80 mm) and the outside diameter is 0.98 inch (24.9 mm). With a rated output of 2 mV/V, the safe overload is 150 percent, zero balance is ±1 percent, and nonlinearity, hysteresis and non repeatability are ±0.5 percent of the rated output. Units have a nominal deflection of 0.002-inch, weigh only 2 oz (57 gm) and operate over a temperature range of -60 to 200F (-50 to 93C) with a compensated temperature range of 60 to 160F (15 to 72C).
In addition to a standard 10-ft long Teflon shielded cable with mechanical strain relief, available options include in-line signal conditioned, amplified or digital output, as well as an IEEE 1451.4 Transducer Electronic Data Sheets (TEDS) version. Other applications for this design include dual tank level control, tank dispensing and bag-filling machinery.
Samsung's Galaxy line of smartphones used to fare quite well in the repairability department, but last year's flagship S5 model took a tumble, scoring a meh-inducing 5/10. Will the newly redesigned S6 lead us back into star-studded territory, or will we sink further into the depths of a repairability black hole?
In 2003, the world contained just over 500 million Internet-connected devices. By 2010, this figure had risen to 12.5 billion connected objects, almost six devices per individual with access to the Internet. Now, as we move into 2015, the number of connected 'things' is expected to reach 25 billion, ultimately edging toward 50 billion by the end of the decade.
NASA engineer Brian Trease studied abroad in Japan as a high school student and used to fold fast-food wrappers into cranes using origami techniques he learned in library books. Inspired by this, he began to imagine that origami could be applied to building spacecraft components, particularly solar panels that could one day send solar power from space to be used on earth.
Biomedical engineering is one of the fastest growing engineering fields; from medical devices and pharmaceuticals to more cutting-edge areas like tissue, genetic, and neural engineering, US biomedical engineers (BMEs) boast salaries nearly double the annual mean wage and have faster than average job growth.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.