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:
Dec. 24, 1991
Filed:
Jun. 27, 1990
Kazunobu Kojyo, Fujisawa, JP;
Yasuhide Nagahama, Fujisawa, JP;
Manabu Nagata, Kamakura, JP;
Toshinao Takayama, Yokohama, JP;
Kabushiki Kaisha Kobe Seiko Sho, Kobe, JP;
Abstract
A method and device determines whether or not an origin return operation is required for an industrial robot, such as an arc welding robot, upon resupplying of power after power cut-off during operation of the robot. The method and device enlarge an applicable range of an origin return elimination technique and also improve the reliability of a rotational angle detecting device. After power cut-off during the operation of the industrial robot, a plurality of position data of the same movable portion of the robot are retrieved, and a determination is made as to whether or not the origin return operation is required upon resupplying of power according to a difference between each position data.