Patents by Inventor Haruhisa Yago

Haruhisa Yago 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 controller with learning error compensation
    Patent number: 10866574
    Abstract: A machine tool controller includes: a servo control unit that generates a positional error based on a difference between a position command for moving a tool and a present position of the tool and generates a drive command for a motor that moves the tool based on the positional error; and a displacement meter that measures a machining surface displacement amount of the workpiece. The servo control unit includes: a compensation amount calculating unit that calculates a shape error of the workpiece with respect to a desired shape for each rotation angle of the workpiece based on the measured machining surface displacement amount and obtains a compensation amount of the positional error based on the calculated shape error of the workpiece; and a first compensation unit that compensates the positional error for each rotation angle of the workpiece based on the calculated compensation amount.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: December 15, 2020
    Assignee: FANUC CORPORATION
    Inventors: Naoto Sonoda, Tomohiko Kawai, Haruhisa Yago
  • MACHINE TOOL CONTROLLER
    Publication number: 20190163161
    Abstract: A machine tool controller includes: a servo control unit that generates a positional error based on a difference between a position command for moving a tool and a present position of the tool and generates a drive command for a motor that moves the tool based on the positional error; and a displacement meter that measures a machining surface displacement amount of the workpiece. The servo control unit includes: a compensation amount calculating unit that calculates a shape error of the workpiece with respect to a desired shape for each rotation angle of the workpiece based on the measured machining surface displacement amount and obtains a compensation amount of the positional error based on the calculated shape error of the workpiece; and a first compensation unit that compensates the positional error for each rotation angle of the workpiece based on the calculated compensation amount.
    Type: Application
    Filed: October 26, 2018
    Publication date: May 30, 2019
    Inventors: Naoto Sonoda, Tomohiko Kawai, Haruhisa Yago