Error correction apparatus for NC machine tool
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United States of America Patent
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Sep 4, 2001
Grant Date -
N/A
app pub date -
Jul 2, 1998
filing date -
Nov 7, 1996
priority date (Note) -
Expired
status (Latency Note)
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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.
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