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Abstract: The NC technology and equipment to the rapid development of high-precision demand, research and development of a new high-precision control technology trajectory. The core contents of a high-frequency high-resolution sampling interpolation tool trajectory generated by the new angle - Two-line position displacement closed-loop control guarantees hope to achieve the exact track and use information technology to track mechanical error correction to eliminate interference and the accuracy of the trajectory The impact to ensure that the machine can be controlled by the production environment in the medium and long-term high-precision operation. This constitutes a new type of numerical control system has been in a variety of domestic CNC machine tools on the application, achieved good results.

Key words: high-precision CNC machine tools trajectory control