Measuring system

Details Measuring system Measuring system

1984-04-24

1985-10-29

Little, Willis

Geometrical instruments

Area integrators

Electrical

33125R, 33125C, G01B 1104

Patent

active

045493545

ABSTRACT:
A measuring system for measuring the relative position of tool machine parts compensates for thermally-induced length changes of a spindle stock by means of a scale carrier which acts as an expansion element for a scale. This scale carrier is fastened at one end directly via a fastening element to the spindle stock and at the other end is connected with an adjacent end of the scale, which is mounted on the scale carrier so as to be shiftable in the measuring direction. If the plane of the tool connected to the spindle stock shifts by an amount .DELTA.c in the measuring direction X as a result of temperature rises of the spindle stock, the scale carrier, operating as an expansion element, acts to pivot a rotatable element having an adjustable lever ratio in order to shift the scale in the same direction. In this way, the entire thermally-conditioned displacement of the scale is also made to equal the amount .DELTA.c.

REFERENCES:
patent: 3816002 (1974-06-01), Wieg
patent: 4060903 (1977-12-01), Ernst
patent: 4170826 (1979-10-01), Holstein

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