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:
Sep. 14, 2004
Filed:
Sep. 12, 2002
Kazutoshi Sakaki, Fujisawa, JP;
Fuminori Makino, Yokohama, JP;
Sumitomo Heavy Industries, Tokyo, JP;
Abstract
A controlling and computing device performs the steps of: differentiating a slider position represented by a position detection signal fed from a position sensor, and calculating the velocity of the slider, differentiating the calculated velocity so as to calculate an acceleration: using a slider target position, the slider position, the velocity and the acceleration to calculate position instruction values to be fed to two servo amplifiers; performing a computation on the respectively calculated position instruction values, so as to compensate for a pressure change which has occurred in each of pressure chambers due to a change in the position of a pressure receiving plate in a cylinder chamber; and producing the respectively compensated position instruction values to the two servo amplifiers.