Absolute encoder (rotary)！

Absolute encoder (rotary)

Incremental encoder output pulse is rotated by a counting device to know its position when the encoder does not move or power outage, counting on internal memory to remember the location of the device. Thus, when the power failure, the encoder does not have any movement, when a call to work during the pulse encoder output, it can not be lost interference pulses, otherwise it will count zero offset memory device, and this bias the amount of shift is no way to know, to know only after the wrong production results appear.

The solution is to increase the reference point, the encoder after every reference point, the reference position correction position count into the memory device. In the previous reference point, it is not guarantee the accuracy of the location. To this end, every operation in the industrial in there to go first reference point, turn the change and other methods.

For example, printers, scanners positioned to use an incremental encoder principle, each boot, we can hear Pilipala while sound, it was looking for a reference zero before work.

Such methods for some industrial projects too much trouble, not even allowed to give change boot (boot will know the exact location), so there is an absolute encoder appears.

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