Flexible interpolation IC supports automatic position correction

October 17, 2019 //By Julien Happich
interpolation IC
The 26-bit encoder signal processor iC-TW29 from iC-Haus comes with integrated EEPROM and is used for the evaluation of magnetic and optical sensors that generate sine and cosine signals.

Just a push of a button is enough to set the required signal amplification and to correct signal errors, e.g. for the assembly of MR sensors or optical sine encoders. Then, a permanent auto-correction minimizes the angular error, so that the integrated RS422 output drivers provide optimal quadrature signals - with up to 262,144 pulses at processing times of either only 2.4 μs or 5 μs. For the first time, the position correction has been integrated for the mechanical eccentricity error, an annoying problem caused by off-centre optical graduations or magnetic pole wheels. The measuring accuracy can now be considerably improved, especially for the smallest incremental encoders – such as the reflective iC-PR2656 – but also for absolute encoders that use an additional data interface for multi-turn information. At the same time, the FlexCount interpolator core provides full flexibility of use: any input resolution, whether binary or decimal, can be converted into any output resolution, independently for ABZ, UVW, BiSS, or SPI. iC-TW29 can also resolve magnetic sensors at the shaft end of servo motors very finely, up to 17 bits and more. A battery-buffered Hall multi-turn encoder can optionally be added.

iC-Haus - www.ichaus.de


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