公开(公告)号：US09995382B2

公开(公告)日：2018-06-12

申请号：US15644774

申请日：2017-07-08

Applicant: HIWIN TECHNOLOGIES CORP.

Inventor： Wei-Ying Chu ,  Hsiao-Ting Wen ,  Yih-Chyun Hwang

IPC: F16H57/01 ,  G01M13/02 ,  F16H57/04 ,  F16H25/22 ,  F16H57/00 ,  F16N29/00

CPC classification number: F16H57/0497 ,  F16H25/2204 ,  F16H35/18 ,  F16H57/0006 ,  F16H57/0408 ,  F16H57/12 ,  F16N29/00 ,  F16N2250/18 ,  G05B23/00

Abstract: A method for determining timing of oil filling for a ball screw can determine whether the oil film in a specific time period is sufficient, falling or insufficient, and then know the optimum timing of oil filling, by comparing the sum of the slope values within respective time periods with a predetermined value. The method is further capable of determining the timing of oil filling even when the rotation speed of the ball screw changes. The method includes a step of signal acquisition, a step of converting signal, a step of defining and saving eigenvalues, a step of calculating eigenvalues, and a step of determining oil filling.