The main precisions of CNC rotary tables include position accuracy, repeatability, return accuracy, angle accuracy, parallelism accuracy, and verticality accuracy. These precisions are used to evaluate the motion accuracy and stability of the rotary table in different aspects. By measuring and testing these precisions, it can be ensured that the motion of the CNC rotary table meets the requirements and improve its accuracy and stability.

Several main accuracies of CNC rotary table inspection include:

1. Position accuracy: The position deviation of the turntable on each coordinate axis, usually measured by the position error of the coordinate axis.

2. Repeatability: The repeatability of a turntable returning to the same position after multiple moves, usually evaluated by regression deviation.

3. Return accuracy: The deviation of the turntable when it returns to the initial position after rotating to the specified position, usually measured by the return deviation.

4. Angular accuracy: The deviation of the turntable when it rotates to a specified angular position, usually evaluated as angular error.

5. Parallelism accuracy: the parallelism deviation between the turntable working plane and the reference plane.

6. Verticality accuracy: the verticality deviation between the turntable working plane and the reference plane.

These accuracies can be measured and inspected by using measuring instruments such as micrometers, angle rulers, scales, etc. to ensure that the motion accuracy of the CNC turntable meets the requirements.