For speed and position monitoring on large diameter shafts, manufacturer Baumer introduces the HDMag line of high-precision, bearing-less, and contact-free magnetic tape encoders. Replacing expensive and complicated specialized solutions that require belts, gears, couplings, and linkages, the HDMag series of encoders is easy to install and will direct mount onto almost any large-shaft torque motor or generator.
Using a patent-pending HDMag MSGP sensor, the series consists of a magnetic encoder that attaches using flexible magnetic tape. The customized tape easily buckles onto the drive or generator shaft, just like a belt. With the help of a welded fastener, the tape is tightened on the shaft and can be quickly exchanged when required. A narrow read-head uses an integrated dual-sensor head mounted to a frame over the flexible tape. This takes up minimal space on the shaft and operates without interruption over the fastening gap in the tape ends, and has no effect on the encoder output signal.
To ensure uninterrupted sensing across the fastening gap, the flexible magnetic tape encoder features an integrated dual sensor head and a signal processing unit. Large permissible tolerances on axial displacement (±5 mm) and an air gap up to 3 mm ease alignment of the sensor head, and ensures reliable detection unaffected by mechanical backlash and vibrations. The encapsulated electronics built in the sensor head are protected against soiling, shocks, and vibrations. The built in FPGA-based signal processing allows for high angular resolutions, better than 0.003° respectively more than 100,000 ppr, and remains unaffected by thermal shaft expansion.
The Baumer Group
Filed Under: News, Sensors