Patents by Inventor Chihiro SAGA

Chihiro SAGA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Machine tool and control method therefor
    Patent number: 9298177
    Abstract: A machine tool according to an embodiment includes a drive mechanism configured to move a control target; a motor configured to operate the drive mechanism; a first encoder configured to detect a position of the control target; a second encoder configured to detect a position of the motor; a servo control unit configured to control the motor; and a numerical control unit configured to receive or calculate an error between the position of the control target obtained from a detection result of the first encoder and a position of the control target obtained from a detection result of the second encoder from the servo control unit, and to estimate a transmission error of the drive mechanism based on a change amount of the error between before and after inversion of a moving direction of the control target.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: March 29, 2016
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Jun Fujita, Chihiro Saga
  • MACHINE TOOL AND CONTROL METHOD THEREFOR
    Publication number: 20140354209
    Abstract: A machine tool according to an embodiment includes a drive mechanism configured to move a control target; a motor configured to operate the drive mechanism; a first encoder configured to detect a position of the control target; a second encoder configured to detect a position of the motor; a servo control unit configured to control the motor; and a numerical control unit configured to receive or calculate an error between the position of the control target obtained from a detection result of the first encoder and a position of the control target obtained from a detection result of the second encoder from the servo control unit, and to estimate a transmission error of the drive mechanism based on a change amount of the error between before and after inversion of a moving direction of the control target.
    Type: Application
    Filed: May 29, 2014
    Publication date: December 4, 2014
    Applicant: Toshiba Kikai Kabushiki Kaisha
    Inventors: Jun FUJITA, Chihiro SAGA