Leland Teschler

Leland
Teschler
Editor,
Machine Design

Leland serves as Editor-in-Chief of Machine Design. He has 34 years of Service and holds a B.S. Engineering from the University of
Michigan, a B.S. Electrical Engineering from the University of Michigan;, and a MBA from Cleveland State University. Prior to joining Penton, Lee worked as a Communications design engineer, for the U.S. Government.

Articles
The difference between ac electrical power and ac electrical energy
Calculations of power and energy are relatively straightforward when the subject is strictly dc circuits. The situation is more complex in the ac world, however. Here are the basics of watts and watt-hours.
Odd-ball vehicles of the week

The recent outdoor match-up between the Detroit Red Wings and the Toronto Maple Leafs was noteworthy not just because it hosted the largest attendance for a hockey game (105,491). Canadian TV viewers of the game also got to see the debut of a pickup truck whose body was made completely of ice. 

Piezomotors on surgical robot make big moves
Researchers at Worcester Polytechnic Institute used nonmetallic piezomotor actuators from MICROMO to make a robot compatible with the gigantic magnetic fields inside MRI scanners.
A Rolls Royce jet engine fan printed at additive manufacturer 3D Systems, on dis
3D-Printed parts of the week

It's easy to find headlines about parts made with additive manufacturing methods. Here are a few of the 3D-printed parts that make the news this week. Their applications range from the frivolous to the sublime. 

Those dead­beat liberal-arts students 8

I once had a classmate in college who bailed out of aerospace engineering and into political science. He really didn’t have much choice. He was on academic probation and close to flunking out of engineering school. But the switch seemed to be the right decision for him, as he went from a D to B+ average.

Give me your tired, your poor, your arrogant 21

When I first began seriously writing about the electronics industry back in the 1980s, I met a number of technologists in the locale around San Jose, that has come to be known as Silicon Valley. As I got to know them better, I also picked up on an attitude some of them shared that surprised me. The thrust of it was that any idea originating outside of a 50-mile radius around San Jose couldn’t be any good.

Sustainable superglue
Scenes from the Assembly Show 2013 1
The Assembly Show came to Rosemont, Ill. this week with an emphasis on new manufacturing and production technology. Here are a few of the more interesting displays we noticed at the event.
Nonstatisticians often screw up statistics 18

Engineers who’ve calculated whether or not their results are “statistically significant” have probably drawn the wrong conclusions about their work. In fact, problems with misapplied classical statistics are so widespread that the subject shouldn’t be taught to undergrads.

Generator works without high-power electronics 1

A researcher in Russia thinks he has a way of generating power from wind turbines and other rotating devices that is super-efficient thanks to the elimination of any intervening power conversion electronics.

The basic idea, as described by Sergey Gandzha of South Urals State University, is to adjust the output of a generator by adding to or subtracting magnetic flux. In his scheme, permanent magnets generate most of the flux. Smaller electromagnets are then controlled in such a way as to add or subtract from the PM flux to get the kind of output desired.

Scenes from Pack Expo 2013

Sustainability and energy efficiency were among the key themes at this year's premier event for the packaging industry. Here are a few of the things attendees could see on the show floor in Las Vegas.

Telepresence robot pans and tilts, thanks to coreless motors
The anthropomorphic InTouch RP-Vita is a 49-in. torso topped by a display with embedded high-resolution cameras and pan-tilt capabilities. Coreless motors that power the pan and tilt of the robot let patients position a built-in video camera to give remotely located doctors a good view of things.
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