Coordinate measuring machine with protected origin point blocks
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United States of America Patent
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Feb 23, 1993
Grant Date -
N/A
app pub date -
Feb 8, 1991
filing date -
Apr 28, 1989
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A coordinate measuring machine capable of selectively setting the origin of measurement by origin point blocks each of which are provided on the base plate of the coordinate measuring machine. In a condition where dust becomes attached to the origin point block, the origin of measurement is missed and the accuracy of the measurement is therefore unreliable. The machine in this invention is arranged to employ cover devices (40A, 40B, 80) to enclose origin point blocks (50A, 50B, 70) respectively and to occasionally expose a portion thereof by an opening and closing motion. That is, only when setting the origin of measurement is the cover opened. This prevents the origin point block from collecting dust thereon suspended in the air. In this end, the origin of measurement can be set precisely to execute an accurate measurement of the object to be measured. Such a technique may be applied to an efficient coordinate measuring machine which has a system to set the origin of measurement by the origin point block having a master ball.
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Family
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Cited Art Landscape
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