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:
Jun. 10, 2014
Filed:
Apr. 07, 2011
Masahiko Nagasaka, Shinshiro, JP;
Yoichiro Shirai, Shinshiro, JP;
Masahiko Nagasaka, Shinshiro, JP;
Yoichiro Shirai, Shinshiro, JP;
Sintokogio, Ltd., Nagoya, JP;
Abstract
The present invention is aimed to realize a method and a system for controlling an electric cylinder by which the load detector that is attached to an electric cylinder and the rod of the cylinder can avoid being overloaded. An unexpected bump between the rod of the cylinder and the material to be pressed can cause that overload. A servo controllerdetermines whether the load for pressurizing Pm detected by the load detectoris larger than or equal to the load for detecting a bump Pc. If it is determined that the load for pressurizing Pm is larger than or equal to the load for detecting a bump Pc, the servo controllerdetermines whether the flag for stopping is ON. Also, the controllerdetermines whether the speed Sm of the rodis greater than or equal to an allowable speed to bump Sc. If it is determined that the flag for stopping is ON or if it is determined that the speed Sm of the rodis greater than or equal to an allowable speed to bump Sc, then the rodis crash stopped by providing to a servo amplifiera command pulse signal for positioning in the reverse direction and by decreasing the number of stored pulses in the amplifier