基于HNC-818B的数控轴螺距误差补偿-AtlantisPress.PDFVIP

International Industrial Informatics and Computer Engineering Conference (IIICEC 2015) A Method of Pitch Error Compensation Based on HNC-818B CNC System Min LUOa, b c d *, Hui-ling LI , Bin MA , Zhi-chu CHEN School of Electrical Information Engineering, Hubei University of Automotive Technology, Shiyan, Hubei, 442002, PR China a b c d C1636@126.com, 105548927@, 272345027@, *Corresponding author Keywords: Ball Screw; Pitch Error; Positioning Accuracy; Laser Interferometer Abstract. The linear motion of CNC machine is generally converted from rotary motion of servo motor through a ball screw nut pair. As most CNC machine is controlled by semi-closed loop system, ball screw nut pitch error is among the main factors influencing machine positioning accuracy. A method is introduced in this article for CNC linear axis pitch error measurement and compensation by using RENISHAW XL30 laser interferometer. Experiments based on HNC-818B vertical machining center show that bidirectional pitch error compensation for ball screw drive mechanism applying this method can greatly improve the machine positioning precision. Introduction At present, the linear motion of CNC machine tool is generally converted from rotary motion of servo motor through a ball screw nut pair. As most CNC machine tools is controlled by semi-closed loop system, when the geometric precision of the machine is guaranteed, the machine axes backlash and ball screw nut pitch error are among the main factors influencing