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:
Nov. 17, 2009
Filed:
Nov. 28, 2006
Mitsuyuki Taniguchi, Shizuoka, JP;
Hirofumi Kikuchi, Yamanashi, JP;
Tadayoshi Matsuo, Yamanashi, JP;
Mitsuyuki Taniguchi, Shizuoka, JP;
Hirofumi Kikuchi, Yamanashi, JP;
Tadayoshi Matsuo, Yamanashi, JP;
Fanuc Ltd, Yamanashi, JP;
Abstract
In an encoder which is equipped with two detectors arranged on both sides of a rotating shaft in order to eliminate an eccentricity error, the mounting of the detectors is facilitated by making provisions so as to not cause a problem in the calculating of an average even if the detectors happen to be so mounted that the difference between the angular values calculated from the outputs of the respective detectors becomes equal to 180°. In an initialization process after power on, the difference Δθ between the angular values θand θcalculated from the signals output from the respective detectors is stored as an initial value. Position data θ is output by taking an average between θand θ, where θis a value obtained by correcting θby the initial difference Δθ.