Error correction apparatus for NC machine tool
AssigneesOkuma Corporation, Mitutoyo Corporation, Kabushiki Kaisha Mori Seiki Seisakusho, Kazuo Yamazaki
InventorsKazuo Yamazaki, Kyoichi Yamamoto, Sadayuki Matsumiya, Naoki Morita
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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.
Claims10
An error compensating device in a numerical control machine tool, comprising:
- movable unit position detecting means for detecting a position along a predetermined control axis, wherein a movement of a movable unit is controlled along the control axis;
- movement condition detecting means for detecting a movement condition of the movable unit in three dimensions in space in response to the position detected by the movable unit position detecting means;
- movement error calculating means for calculating a machine movement error by the use of the movement condition;
- and
- movement error compensating means for compensating for the machine movement error on the basis of the machine movement error.
Dependencies are inferred from the claim text.