Seeing the world in a grain of sand

Article Abstract:

A new gear unit has been developed which has a ratio of 3 million-to-one. However the unit is unlikely to be commercially viable because its gearbox is the size of a grain of sand. It has been developed in the United States to operate in micro engines and, in theory, transmits enough force to shift a one-pound weight. The unit can both increase and decrease speed. The technology is probably going to be useful in satellites, which have to be as light as possible, in aviation, nuclear technology, microsurgery and in optical telescopes.

Product development, Sandia National Laboratories, Micromechanics, Micromechanics (Engineering), Gearing, Gears

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Resin competes with metal moulds

Article Abstract:

Issues concerning the characteristics of a resin mould material are discussed, with focus on the material's advantages by comparison with other materials. Particular attention is given to the material's structural integrity.

Product information, Equipment and supplies, Automobile industry, Polymers, Synthetic gums and resins

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Brushing up on alternatives

Article Abstract:

Advice on choosing servos and steppers is presented. Servos are often more expensive than their AC inductance counterparts, but economies of scale will emerge as their usage grows.

Purchasing, Servomechanisms, Stepping motors

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