The accuracy of CNC machine tools is an important indicator of machine tool performance, which is an important factor affecting the accuracy of the workpiece. The positioning accuracy of CNC machine tools refers to the positional accuracy that can be achieved by the movement of each coordinate axis of the machine tool under the control of the numerical control device. It belongs to static precision and reflects the original precision of the machine tool. The positioning accuracy is the same as the geometrical accuracy of the machine tool, which will have an important impact on the cutting accuracy of the machine tool, especially affecting the hole pitch error during the hole machining.
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The positioning accuracy of CNC machine tools can be understood as the motion accuracy of the machine tool. Ordinary machine tools are manually fed. The positioning accuracy is mainly determined by the reading error. The movement of the CNC machine tool is realized by digital program instructions. Therefore, the positioning accuracy is determined by the numerical control system and mechanical transmission error. Selecting the quality machine tool to look at ALLES CNC, the movement of each moving part of the machine tool is completed under the control of the numerical control device. The precision that each moving part can achieve under the control of the program command directly reflects the precision that the machined parts can achieve. Therefore, positioning Accuracy is a very important test.
Seven common positioning accuracy detection methods for CNC machine tools:
1. Linear motion positioning accuracy detection.
2. Linear motion repeat positioning accuracy detection.
3. The origin return accuracy detection of linear motion.
4. Reverse error detection of linear motion.
5. Detection accuracy of the rotary table.
6. Repeated indexing accuracy detection of the rotary table.
7. The origin return accuracy detection of the rotary table.
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