In CNC machining centers, achieving precise positioning and efficient processing are key factors to improve production efficiency and processing quality. The following are some common methods to improve the precise positioning and efficiency of machining centers:

1. High-precision CNC system: Choose a CNC system with high precision and stability to ensure that the machining center can achieve accurate positioning and motion control under various working conditions.

2. Precision guide rails and slide blocks: Use high-precision linear guide rails and slide blocks to reduce friction and gaps in the motion system and improve the motion accuracy of the machining center.

3. High-precision spindle: The use of high-precision spindle ensures that the tool can still maintain stable positioning and cutting performance when rotating at high speed.

4. Rigid machine tool structure: The machine tool structure of the machining center must be rigid enough to prevent vibration and deformation, thereby ensuring high-precision positioning and cutting.

5. High-precision sensors: Use high-precision position sensors and measurement systems to monitor the positions of workpieces and tools in real time, thereby providing real-time feedback and adjustments to the CNC system.

6. Tool positioning and length compensation: Use precise tool positioning system and length compensation function to ensure the accurate position and cutting size of the tool.

7. Automated process: Apply automated process, including automatic tool changing, automatic workpiece loading and unloading, automatic measurement, etc., to reduce the impact of human factors on processing accuracy.

8. Advanced tool path planning: Use advanced tool path planning algorithms to minimize idling and non-productive time during cutting and improve processing efficiency.

9. Optimized cutting parameters: According to different workpiece materials and geometric characteristics, the cutting parameters are optimized to ensure high accuracy while improving processing efficiency.

10. Regular maintenance: Regular maintenance of the machining center, including cleaning, lubrication, calibration, etc., to maintain stable performance of the machine tool and control system.

By combining the above methods, the precise positioning and work efficiency of the CNC machining center can be effectively improved to meet the high-precision and high-efficiency processing requirements.