Optical Absolute Encoder！

Absolute encoder is determined by the mechanical position of the uniqueness of each location, without having to remember it, no need to find a reference point, and would not have to count, when you need to know where and when to go read its position. Thus, interference encoder properties, has greatly enhanced the reliability of the data.
Since the absolute encoder positioning clearly superior to incremental encoder, has been increasingly used in industrial targeting. Absolute encoders because of its high accuracy, the output bit more, if you still use parallel outputs, each of which an output signal of the need to ensure a good connection, but also for more complex conditions isolation, the number of multi-core cable connection, thereby inconvenience and reduced reliability, and therefore, the absolute encoder multi-bit output type, generally use the serial output or bus output, the German production of absolute encoder is the most common serial output SSI (synchronous serial line output).
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 that the installation of unnecessary hard to find zero, as a starting point to an intermediate position 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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