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

Volume

3

fYear

2000

fDate

2000

Firstpage

2213

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics Society, 2000. IECON 2000. 26th Annual Confjerence of the IEEE

Conference_Location

Nagoya

Print_ISBN

0-7803-6456-2

Type

conf

DOI

10.1109/IECON.2000.972619

Filename

972619