| January
30, 2004 - Duncan Electronics, a division of BEI Technologies, Inc., has developed a new compact optical incremental encoder based on their reliable Opto-ASIC technology. The new device features an integral 5 pin mating connector that mates with both AMPHENOL and MOLEX standard configurations. This combination allows designers greater flexibility in integrating a very high resolution, complete encoder solution into an extremely small package, ready for "plug 'n play" installation.
 The
920 Series offers one of the industry’s smallest
optical disc-reading caliper configurations, capable
of accepting disc radii as small as 9.78mm with resolutions
up to 2450 PPR (Pulses Per Revolution). This Opto-ASIC
technology allows the unit to be very tolerant to mounting
alignment issues, enabling them to be installed without
tight tolerance constraints. This is important when
considering the added costs of time-consuming alignment
issues during assembly.
Phased-Array
Opto-ASIC Technology Advantages
The combined advantages of highly miniaturized packaging
and the success of Duncan's Opto-ASIC design, a phased
array photo diode IC noted for its high tolerance to
axial movement (+/- 0.010") and low power consumption
(50mA max.), the 920 offers a leveraged value in its
use in a myriad of new and emerging applications, including
security systems, meter control and automation applications.
This range of Opto-ASIC chips offers 5-volt TTL-compatible
dual channel quadrature output with index options.
New
Integrated Connector, Reduced Footprint
Designed to further reduce assembly time and lower interfacing
costs, the 920 Series is featured with an integral 5-pin
connector that mates with industry standard AMPHENOL and
MOLEX connector configurations. The unit's overall footprint
is only 1.25" x 1.05" x 0.39" (31.75mm x 26.67 x 9.9mm),
including caliper, connector and PCB mounting board. The
920 can be specified for SMT or conventional fastener
mounted installations.
Standard stainless steel code disks are available in a
broad range of standard radii, with standard resolutions
starting at 90 PPR (0.365"/9.78mm radii) and ranging up
to 2540 PPR (requiring a .920"/23.37mm optical radius).
This family of disks can also accommodate shaft diameters
from 0.125" to 1.0". Not all resolutions are available
in each diameter. BEI Duncan Electronics also offers a
lower cost photographic film code disk capable of operation
at 105 C and resolutions up to 2540 PPR.
"This new generation encoder offers high performance with
very small space needs, where to the design engineer these
attributes are rarely this compatible" stated John Pindroh,
BEI Duncan Sales Manager. He further stated, "The joint
efforts between core customers and our engineering group
enabled us to balance these constraints, resulting in
greater product flexibility and lower unit pricing."
About BEI Duncan Electronics
BEI Duncan Electronics is an operating division of BEI
Technologies, Inc. (NASDAQ: BEIQ). BEI is an established
manufacturer of electronic sensors and motion control
products used for factory and office automation, medical
and scientific equipment, military, aviation and space
systems, and transportation equipment including automobiles,
trucks and off-road equipment. The company's product portfolio
includes optical encoders, brushless DC motors, voice
coil actuators, potentiometric position sensors, quartz
microelectomechanical system (MEMS) devices, rotation
rate sensors, pressure transducers, and servo systems.
For
further information, contact BEI Duncan Electronics,
15771 Red Hill Avenue, Tustin, CA 92780, Tel. (714)
258-7500, Fax (714) 258-8120; email: sales@beiduncan.com;
website: http://www.beiduncan.com.
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