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:
Aug. 11, 2009
Filed:
Dec. 17, 2007
Koji Eba, Aichi, JP;
Koji Eba, Aichi, JP;
Okuma Corporation, Aichi, JP;
Abstract
In a noncircular shape machining apparatus, a toolis moved reciprocally in an X-axis direction by a tool-moving mechanism. A first acceleration sensoris disposed on a saddle, which is an immovable section of the tool-moving mechanism. Further, a second acceleration sensoris disposed on a spindle bearingof a spindle that holds and causes a workpieceto rotate. Additionally, displacements of the saddleand the workpieceare measured by these two acceleration sensorsand, and displacement in the relative distance between the workpieceand the toolis acquired as relative displacement on the basis of the two displacements that have been obtained. Additionally, the position of the toolis calculated from the obtained displacement and the output value of an X-axis linear scale