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.

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