Baumer (Southington, CT) has introduced HDMag magnetic hollow-shaft encoders for direct mounting onto large-sized shafts up to 740 mm in diameter. Available in both absolute and incremental versions, the encoders provide 17-bit absolute single-turn resolution. Measuring 27 mm wide, the encoders are suited for limited-space applications. FPGA signal processing and integrated offset amplitude and phase control enable the encoders to generate maximum incremental square pulses of 524,288 periods per revolution, and a maximum sine/cosine interpolation of 32,768 periods per revolution.

Signal processing integrated in the sensor head enables generation of sine/cosine signals or square-wave signals. The encoders consist of an IP68 stainless steel encoder wheel that mounts directly on the drive shaft, and an IP67-rated sensing head that is fully encapsulated and protected from contaminants. Fitted with a protective covering, the magnetic scale on the outside of the encoder wheel is sensed tangentially. The encoders have no moving parts, light source, or breakable/glass components.

For Free Info Click Here 

Motion Control Technology Magazine

This article first appeared in the August, 2010 issue of Motion Control Technology Magazine.

Read more articles from this issue here.

Read more articles from the archives here.