What are the characteristics of repetitive positioning accuracy of linear motion in precision parts processing
The positioning accuracy of CNC lathe in precision parts processing is to measure the position accuracy of the moving parts of the machine tool under the control of the CNC system. According to the measured positioning accuracy value of a CNC lathe, the best machining accuracy of the workpiece can be determined.
The main detection contents of positioning accuracy include: linear motion positioning accuracy, linear motion repetitive positioning accuracy, etc. What we need to know today is linear motion repetitive positioning accuracy.
The accuracy is the basic index reflecting the stability of coordinate axis movement, and the stability of machine tool movement determines the quality stability and error consistency of precision parts processing.
The general inspection method is to measure at any three positions close to the midpoint of each coordinate stroke and at both ends. Each position is positioned by rapid movement. Under the same circumstances, the positioning is repeated 7 times, the coordinate value of the positioning point is measured, and the maximum difference between readings is calculated. Take 2/1 of the maximum difference of the three positions as the repeated positioning accuracy of the coordinate after taking the ± sign.