The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 2019
Filed:
May. 03, 2017
Hiwin Technologies Corp., Taichung, TW;
Chih-Chun Cheng, Taichung, TW;
Ping-Chun Tsai, Taichung, TW;
Wen-Nan Cheng, Taichung, TW;
Yu-Hsin Kuo, Taichung, TW;
Yin-Chun Cheng, Taichung, TW;
Hsi-Hsun Cheng, Taichung, TW;
Kuan-Te Yu, Taichung, TW;
Hiwin Technologies Corp., Taichung, TW;
Abstract
A method for estimating a variation in a preload applied to a linear guideway of a machine tool includes steps of: a) obtaining, via each of vibration sensors, first and second vibration signals that are generated according to detection of vibration of a table disposed on the linear guideway respectively at first and second time instants; b) determining, via the computation module, first and second natural frequencies based on a theoretical mode shape and respectively on the first and second vibration signals; and c) determining, via the computation module, the variation in the preload based on the first and second natural frequencies.