Multi-turn absolute encoder. Encoder manufacturers use mechanical timepiece gear principle, when the center of the code wheel rotates through another set of code wheel gear (or sets of gear, multiple sets of code disk), single-turn encoder, based on the additional number of turns coding, to expand the measurement range of the encoder, absolute encoder so called multi-turn absolute encoder, it is also determined by the mechanical position encoders, position encoding each unique non-repetition, without memory. Another advantage of the multi-turn encoder is due to the large measurement range, the actual use is often more affluent, so hard to find when you install unnecessary zero to an intermediate location as a starting point on it, and greatly simplifies the installation difficult. Multi-turn absolute encoder positioning advantage in length significantly, it has been increasingly used in industrial targeting.
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