What are the advantages of absolute single-turn encoders and absolute multi-turn encoders？

What are the advantages of absolute single-turn encoders and absolute multi-turn encoders?

What are the features and differences between absolute single-turn and multi-turn encoders?

Features of Absolute Encoder:

There are many optical channel engraved lines on the optical code disc of the absolute encoder, and each engraved line is arranged in order of 2 lines, 4 lines, 8 lines, 16 lines... In this way, in the encoder, after reading the brightness of each reticle, for each position of the zero power from the zero power of 2 to the power of n-1, only a set of binary codes (gray codes) are obtained. An n-bit absolute encoder. Such an encoder is determined by the mechanical direction of the photoelectric encoder disk, and will not be affected by power outages or interference, and will not cause losses in some unexpected situations.

The absolute encoder is unique at each position determined by the mechanical position. It does not need to be called, find the reference point, and does not need to continue counting. When it needs to know its location, when to read its location. In this way, the anti-interference characteristics of the encoder and the reliability of the data will be greatly improved

The functional difference between single-turn absolute encoder and multi-turn absolute encoder is as follows:

Rotate a single-turn absolute encoder to measure each engraved line of the photoelectric encoder disc during the rotation to obtain a unique code. When the rotation exceeds 360 degrees, the code will return to the origin, so it is not suitable for a unique absolute value code. In principle, this kind of encoding can only be used for measurement within 360 degrees of the rotating scale, which is called a single-turn absolute encoder. If you want to measure the rotation ratio of more than 360 degrees, you must use a multi-turn absolute encoder.

Absolute encoder manufacturers can use the principle of clock gear mechanism. When the intermediate code disc rotates, another group of code discs (or multiple sets of gears, multiple sets of code discs) are driven by gears and encode the number of turns based on the single-turn code. In order to extend the measuring range of the encoder, this type of absolute encoder is called a multi-turn absolute encoder. It is also encoded by mechanical direction confirmation, and each direction encoding will not be repeated, so there is no need to remember. Another advantage of multi-turn encoders is that because of the large measurement scale, the actual use is often a lot richer, so there is no need to laboriously find the change point when installing, and a certain intermediate position can be used as the starting point, which greatly simplifies the difficulty of device debugging.

The above is the editor of okplazas.com encoder manufacturer: What are the advantages of absolute single-turn encoder and absolute multi-turn encoder? For related introductions, friends who are interested are welcome to exchange and learn together!