Good for simple applications like automotive power window actuators, or demanding duty in heavy or high-precision machinery, this new screw drive offers low-friction, vibration-free operation, high force magnification, and the ability to accept input speeds exceeding 20,000 rpm.
Fine-pitch spindle threads, corresponding grooves on the rollers, and additional coarser roller grooves transmit force to the nut. Design options permit a wide range of feeds per revolution. These include rollers with circular grooves for both nut and spindle engagement, or rollers with threads engaging the spindle and circular grooves engaging the nut.
In addition, hollow-shaft motors can be installed directly on the nut, making a self-contained actuator with a power/weight ratio similar to or better than hydraulic actuators.
George Jaffe, Schneeberger Inc., 11 DeAngelo Dr., Bedford, MA 01730; Tel: (617) 271-0140.
At the Design News webinar on June 27, learn all about aluminum extrusion: designing the right shape so it costs the least, is simplest to manufacture, and best fits the application's structural requirements.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This radio show will show what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.