Hello
Is "reajust" means change type of encoder? Encoder is connected to the motor and gives "somewhere" info. To read info in right way, in this "somewhere" you assigned parameters of encoder. And now if you need to replace old encoder with new, but the same type - just disconect old and connect new. But if you want to change type (not so often

), must assigned this new parameters in device that will read data.
regards