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:
Mar. 29, 2011
Filed:
Jun. 03, 2008
Chin-hsien Ting, Taipei Hsien, TW;
Rong-hwang Horng, Taipei Hsien, TW;
Yaw-shen Lai, Taipei Hsien, TW;
Hsing-chang Liu, Taipei Hsien, TW;
Chin-Hsien Ting, Taipei Hsien, TW;
Rong-Hwang Horng, Taipei Hsien, TW;
Yaw-Shen Lai, Taipei Hsien, TW;
Hsing-Chang Liu, Taipei Hsien, TW;
Foxnum Technology Co., Ltd., Tucheng, Taipei County, TW;
Abstract
An apparatus and method for servomotors of an electric injection molding machine includes a motion controlling unit, two driving amplifying units, and two servomotors respectively connected to the driving amplifying units. The motion controlling unit includes two servomotor position controllers both for receiving a first position command, and the driving amplifying units are respectively connected to the servomotor position controllers for receiving a second and third position command. Two position detectors are respectively received in the two screw caps that are mounted to the servomotors for detecting absolute positions of the corresponding screw caps. The screw caps are respectively connected to inputs of the first and second servomotor position controllers to form two screw cap position feedback circuits. The values of the screw cap position feedback circuits are compared to the first position command for being input into the driving amplifying units to drive the corresponding servomotors to act synchronously.