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:
Jan. 31, 2006
Filed:
Jan. 24, 2005
Kichio Nakajima, Tsuchiura, JP;
Akira Busujima, Ebina, JP;
Yasushi Ito, Ebina, JP;
Nobuhiko Suzuki, Ebina, JP;
Toru Yuki, Ebina, JP;
Kichio Nakajima, Tsuchiura, JP;
Akira Busujima, Ebina, JP;
Yasushi Ito, Ebina, JP;
Nobuhiko Suzuki, Ebina, JP;
Toru Yuki, Ebina, JP;
Hitachi Via Mechanics Ltd., Ebina, JP;
Abstract
The invention provides an active mass damper by use of which a machining apparatus can be downsized. The active mass damper includes a support unit for supporting a weight movably and horizontally, a motor for driving the weight, and a controller for controlling the motor. A torque command signal to be given to a motor of an X-table and a torque command signal to be given to a motor of a Z-table are put into the controller of the active mass damper so that the motor for driving the weight can be driven by feed-forward control using the torque command signals and feedback control based on the displacement of the weight.