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:
Jun. 02, 1987
Filed:
Mar. 30, 1984
Takushi Okada, Yokohama, JP;
Shunji Mohri, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A position error correcting method and apparatus suitable for operating an industrial robot with high accuracy, in which, after the industrial robot disposed on a working site is moved according to position command values, the moved position of a measurement point on the industrial robot is measured three-dimensionally, and a position error of the industrial robot between the robot coordinate system relating to the operation of the industrial robot and the absolute coordinate system of the industrial robot on its working site is computed by comparing the measured position values of the measurement point with the position command values. The work program prepared for the operation of the industrial robot is modified on the basis of the computed position error so that the industrial robot can be operated in accordance with the work program from which the source of the position error has been eliminated.