Patents by Inventor Michiharu Kawahara

Michiharu Kawahara 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).

  • Numerical controller for machine tool with function of controlling speed of arc operation
    Patent number: 8744612
    Abstract: A numerical controller for machine tools that has function of controlling the speed of arc operation calculates a first operable feedrate based on the arc radius of a machining path and the allowable frequency (or allowable angular speed) to which servo position control is capable of responding. The numerical controller also calculates a second operable feedrate based on the arc radius of the machining path and the allowable acceleration to which servo position control can respond, and selects the minimum feedrate from the commanded feedrate and the calculated first and second feedrate to perform speed control.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: June 3, 2014
    Assignee: FANUC Corporation
    Inventors: Soichiro Ide, Michiharu Kawahara, Takenori Ono
  • NUMERICAL CONTROLLER FOR MACHINE TOOL WITH FUNCTION OF CONTROLLING SPEED OF ARC OPERATION
    Publication number: 20120010745
    Abstract: A numerical controller for machine tools that has function of controlling the speed of arc operation calculates a first operable feedrate based on the arc radius of a machining path and the allowable frequency (or allowable angular speed) to which servo position control is capable of responding. The numerical controller also calculates a second operable feedrate based on the arc radius of the machining path and the allowable acceleration to which servo position control can respond, and selects the minimum feedrate from the commanded feedrate and the calculated first and second feedrate to perform speed control.
    Type: Application
    Filed: April 29, 2011
    Publication date: January 12, 2012
    Applicant: FANUC CORPORATION
    Inventors: Soichiro IDE, Michiharu Kawahara, Takenori Ono