Patents by Inventor Kenji Sawashima

Kenji Sawashima 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 control apparatus and method of controlling acceleration/deceleration of spindle motor of numerical control apparatus
    Patent number: 6008609
    Abstract: A spindle acceleration/deceleration controlling method in a numerical control unit comprising a spindle control section for controlling a spindle motor and a servo axis controlling section for controlling a servo axis motor, and for synchronously controlling the spindle and servo axis; wherein a spindle motor in the position loop control state is controlled with an acceleration/deceleration pattern similar to that of the spindle motor in the velocity loop control state.
    Type: Grant
    Filed: December 3, 1996
    Date of Patent: December 28, 1999
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kenji Sawashima, Minoru Andou