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:
Mar. 31, 2020
Filed:
Apr. 17, 2018
Mitutoyo Corporation, Kanagawa, JP;
Hiroomi Honda, Miyazaki, JP;
Toshihiro Kanematsu, Miyazaki, JP;
MITUTOYO CORPORATION, Kanagawa, JP;
Abstract
In a control method of a drive stage device, a stage is floated on an air bearing, then a height of the stage while floating on the air bearing is measured as a first height. A work piece is placed on the stage and a height of the stage while holding the work piece is measured as a second height. A difference between the first height and the second height is calculated as a drop amount, and a weight of the work piece is calculated based on the drop amount. An upper limit speed of one of rotational drive and horizontal movement of the stage is determined based on the calculated work piece weight. A speed of the one of the rotational drive and the horizontal movement of the stage is controlled so as to not exceed the upper limit speed.