November 22, 2016 – POSITAL introduced a family of kit encoders, designed to provide the manufacturers of servomotors and other machinery with tools for building rotary position measurements into their products. The kit encoders are based on POSITAL’s self-contained magnetic rotary encoders. Further, the core components of these instruments are available as separate assemblies that can be readily integrated into other products.
While POSITAL’s magnetic encoder technology provides slightly less precision than the best optical disk encoders, it is less costly, less vulnerable to contamination from oil or dust and more resistant to shock and vibration. POSITAL encoders also provide an all-electronic multi-turn absolute position measuring capability that evaluates the full absolute angular position, including the total number of shaft rotations. The rotation counter is powered by the company’s Wiegand-effect energy harvesting technology so that rotation counts are accurate, even if the rotations occur when external power is unavailable. This system eliminates the need for backup batteries or for the geared optical disks used in some products.
POSITAL magnetic kit encoders are can be incorporated into normal manufacturing processes since they don’t require extra-precision, near-cleanroom assembly conditions. A built-in self-calibration capability can compensate for small sensor-to-shaft alignment errors. The electronic components, including Hall-effect sensors, a 32-bit microprocessor and the Wiegand-wire energy harvesting system, are packaged in a convenient 36 mm diameter, 24.2mm deep unit. For servomotors with magnetic brakes, a special magnetic shield has been developed to isolate the magnetic pickups of the measurement system from the external magnetic fields.
The resolution of the new POSITAL kit encoders is 17 bit, with an accuracy of better than + 0.1°. The operating temperature range is -40 to +105 °C. These devices are available with a variety of non-proprietary communications protocols, including BISS, SSI and RS485-based protocols.
About POSITAL
POSITAL is a supplier of advanced industrial position sensors used in a wide variety of motion control and safety systems. The company is also an innovator in product design and manufacturing processes and a pioneer of Industry 4.0 (Industrial Internet of Things/IIoT), offering customers the benefits of built-to-order products combined with the price advantages of mass-production.
