The difference between absolute encoder and incremental encoder！

First, the incremental rotary encoder
Per revolution, incremental shaft encoder to provide a certain number of pulses.
Measured periodically or the pulses per unit time can be used to measure the speed of movement.
If it is accumulated in a reference point behind the number of pulses, the calculated value represents the angle of rotation or stroke parameters. Dual-channel encoder output pulse A, B is the difference between 90 degrees to make the rotation sensing signal received pulse electronic device receiving the shaft, and therefore can be used to achieve bi-directional positioning control; In addition, the three-channel incremental rotary encoder per circle pulse (Z) is called a zero signal.
Second, the absolute rotary encoder
Absolute encoder position of each axis to provide a unique value for the digital encoding. Especially in position control applications, the absolute encoder reduces the computational tasks receiving electronic device, thereby eliminating the need for complicated and expensive input device; and when the machine on the power after a power failure or power, not need to return to the position of the reference point, you can take advantage of the current position value.
Single-turn absolute encoder The axis is subdivided into a predetermined number of measuring steps, the maximum resolution of 16 bits (24 imports can be done on a loop 16777216 segmentation degrees), which means that the maximum distinguishable 65536 position + multi-turn absolute encoder not only energy, but also multi-step measurement of the number of turns in a circle measuring the angular displacement of the gear. The number of laps for 12 more laps, meaning that the maximum 4096 revolutions can be identified. The total resolution of up to 25 or 28.
Parallel absolute rotary encoders transfer position to estimate the value of the electronic device are transmitted in parallel by several cables.
Serial absolute encoder, the output data using standard interfaces and standardized protocol to transfer, while in the past to achieve a point to point connection serial data transfer.

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