Permanent-magnet stepper and gear motors range from 15- to 60-mm in diameter, provide step angles of 1.8 and 3.6 degrees (hybrids), and 3.6, 7.5, 15, and 18 degrees (permanent magnet). Both motors come in standard industry configurations for drop-in replacement. Stepper Motor Handbook includes specification sheets, a quick reference chart, and a tutorial on stepper motor technology. In addition, application notes, formulas, and terminology are included.
Thomson Industries Inc., 2 Channel Dr., Port Washington, NY 11050, FAX (516) 883- 9039
Some of our culture's most enduring robots appeared in the 80s. The Aliens series produced another evil android, and we saw light robot fare in the form of Short Circuit. Two of the great robots of all time also showed up: The Terminator and RoboCop.
Optomec's third America Makes project for metal 3D printing teams the LENS process company with GE Aviation, Lockheed, and other big aerospace names to develop guidelines for repairing high-value flight-critical Air Force components.
This Gadget Freak review looks at a cooler that is essentially a party on wheels with a built-in blender, Bluetooth speaker, and USB charger. We also look at a sustainable, rotating wireless smartphone charger.
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.