San Jose, Calif. Avago Technologies extends its incremental optical encoder line with versions that include resolution performance up to 20,000 cycles per revolution (cpr). These devices include all the elements required for installation in a customer-supplied housing.
The AEDA-3300 series encoders are available in resolutions from 600 to 20,000 cpr at speeds of up to 12,000 rpm. (These range from 10,000 rpm for 6,000 cpr to 1950 rpm for 20,000 cpr.) Operating frequencies are available up to 1 MHz for resolutions less than 10,000 cpr, and 650 kHz for resolutions between 10,000 and 20,000 cpr.
Using quadrature decoding with the highest-resolution version can provide a maximum of 80,000 pulses per revolution (ppr), said the company. Outputs are two-channel quadrature with a third-gated index channel, and the encoder comes with an integrated RS-422 differential line driver. With a rated operation from -40°C to 125deg;, these optical encoders can be used for industrial applications ranging from servo and stepper motors to automation equipment such as robotic arms and wafer-handling machines.
By providing a miniature device that offers a wide range of resolutions in a kind of one-size-fits-all, it allows designers to use one design platform for all resolutions, thereby reducing costs. Chong Khin Mien, vice president for the Motion Control Products Division at Avago Technologies stated that the new incremental optical encoders provide twice the performance at less than one-fifth the price of traditional housed encoders.
While most optical encoders are supplied in several diameters, based on limitations in code wheel and interpolation technology (the higher the resolution, the larger the code wheel diameter), the AEDA-3300 series encoders provide the same diameter regardless of resolution. For example, one version designed for manufacturers of housed encoders comes with a total package size of 17-mm diameter x 24-mm high. A 28-mm diameter x 27-mm high version with a mounting plate is also available for motor manufacturers that incorporate an optical encoder as part of a complete motor assembly.
In addition, the encoder package includes a code wheel that has been pre-aligned to the encoder optics. The integrated bearing stage also allows for a greater tolerance to customer shaft position variations, without impacting the encoder performance, said the company. Click the link for more information about Avago's motion control products.
Pricing ranges from $44 to $71 each in quantities of 3,900 for resolutions from 600 to 20,000 cpr.
Avago Technologies, 1-800-235-0312, www.avagotech.com