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:
Apr. 12, 2011
Filed:
Oct. 30, 2009
Yasusuke Iwashita, Yamanashi, JP;
Tadashi Okita, Yamanashi, JP;
Hiroyuki Kawamura, Yamanashi, JP;
Satoshi Ikai, Yamanashi, JP;
Yasusuke Iwashita, Yamanashi, JP;
Tadashi Okita, Yamanashi, JP;
Hiroyuki Kawamura, Yamanashi, JP;
Satoshi Ikai, Yamanashi, JP;
Fanuc Ltd, Yamanashi, JP;
Abstract
A control device, for a servo die cushion, capable of improving a response after overshoot generated by collision of a slide and a die cushion. The control device has a local maximum point judging part which judges a local maximum point based on the detected speed of the servomotor; a speed correction value calculating part which calculates a speed correction value for the servomotor based on the judgment result and the detected speed of the slide; a second force commanding part which generates a second force command value, the second force command value decreasing from an initial value to a first force command value, the initial value being equal to the force detected value when reaching generally the local maximum point. The force command value is switched from the first force command value to the second force command value, when the force detected value reaches the local maximum point.