What is the use of CNC spindle encoder? What would happen without it？！

What is the use of CNC spindle encoder? What would happen without it？


What is the use of CNC spindle encoder?It is used for detecting the position and speed.  spindle orientation, spindle positioning, thread cutting, speed display, and so oncan be achieved, . When no spindle encoder, these functions can not be realized. Turn feeding and constant surface speed function can not be achieved.

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