Patents Assigned to Mitutoyo Corportion
  • Error correction apparatus for NC machine tool
    Patent number: 6286055
    Abstract: There is here disclosed a movement error compensating device for a movable unit such as a slider in a numerical control machine tool. A laser beam is emitted from a reference position beam generator installed on a fixed base in the movement direction of the slider. The slider is provided with a beam passing position detector, which detects a deviation on YZ planes of the laser beam. In order to properly detect the irradiation direction of the laser beam, the fixed base is equipped with a movement end beam position detector.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: September 4, 2001
    Assignees: Okuma Corporation, Mitutoyo Corportion, Kabushiki Kaisha Mori Seiki Seisakusho
    Inventors: Kazuo Yamazaki, Kyoichi Yamamoto, Sadayuki Matsumiya, Naoki Morita