For a gear to perform properly, the contact pattern is critical. Typically, the ideal tooth contact pattern under load should encompass the bulk of the tooth surface, but not touch the edge. It isn't easy. The design usually begins with guesswork, and errors are ironed out after physical testing. Arrow Gear Company (www.arrowgear.com) says it has a better idea. Using software and hardware from Gleason Corp. (www.gleason.com), the company now builds virtual models to predict how the gear will perform in actual operation. Computer analysis generates settings for machine tools, saving setup time. Arrow engineers say that the computer modeling yields the ideal tooth pattern on the first or second attempt on the manufacturer's floor.
In this new Design News feature, "How it Works," we’re starting off by examining the inner workings of the electronic cigarette. While e-cigarettes seemed like a gimmick just two or three years ago, they’re catching fire -- so to speak. Sales topped $1 billion last year and are set to hit $10 billion by 2017. Cigarette companies are fighting back by buying up e-cigarette manufacturers.
Microchip recently released the 3D TouchPad, the first USB PC Peripheral device that couples 2D multi-touch input with 3D air gesture technology. The company seeks the help of developers to further enhance the capabilities of the technology.
To give engineers a better idea of the range of resins and polymers available as alternatives to other materials, this Technology Roundup presents several articles on engineering plastics that can do the job.
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.