Title :
Compensation for position-varying lost motion to improve the contouring accuracy of NC machine tools
Author :
Sugie, Hiroshi ; Iwasaki, Takashi ; Nakagawa, Hideo ; Kohda, Seido
Author_Institution :
IESL, Mitsubishi Electr. Corp., Amagasaki, Japan
Abstract :
Lost motion is a major disturbance to the contouring accuracy of NC machine tools. NC machine tools with large travel area sometimes show position-varying lost motion. Conventional step type backlash compensation applied to that lost motion, causes contouring error due to inadequate compensation. The paper presents a model of a two-body system with a position dependent spring and position dependent friction that exhibits position-varying lost motion, and a compensation method for that lost motion introduced from the model. Experimental results show the improved performance of the proposed method
Keywords :
compensation; machine tools; numerical control; position control; NC machine tools; compensation; contouring accuracy; position dependent friction; position dependent spring; position-varying lost motion; two-body system; AC motors; Artificial intelligence; Computer numerical control; Feeds; Friction; Machining; Neural networks; Servomechanisms; Servomotors; Springs;
Conference_Titel :
Industrial Electronics Society, 2000. IECON 2000. 26th Annual Confjerence of the IEEE
Conference_Location :
Nagoya
Print_ISBN :
0-7803-6456-2
DOI :
10.1109/IECON.2000.972619
