Optimal tuning of backlash acceleration parameters for quadrant protrusion reduction in CNC machine tools

摘要

A backlash acceleration function was developed to significantly reduce quadrant protrusions when a machine tool performs circular contour tests. In practice, the backlash acceleration parameters that affect the degree of influence of a backlash acceleration function are adjusted by experienced workers using a trial-and-error technique that is time consuming and unreliable and never yields values approaching optimal values. In this study, the Taguchi method was utilized with an L_9 orthogonal array (3~4) in combination with a parameter-range reduction algorithm to reduce quadrant protrusions in circular contour tests. Several circular contour tests were performed on a three-axis computer numerical control milling machine. The experimental results showed that the approaches proposed in this paper can significantly reduce quadrant protrusions.