Garage door openers move the heaviest moving object in your home, so it is surprising that the designers would omit a load bearring from the rotating object. However, it is still common to see metal on metal contact in consumer items. Ususally, the difference between professional and a consumer model from any manufacturer is the quality of the shaft bearrings.
The Smart Emergency Response System capitalizes on the latest advancements in cyber-physical systems to connect autonomous aircraft and ground vehicles, rescue dogs, robots, and a high-performance computing mission control center into a realistic vision.
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.