Apparatus for determining the deviations from a circular form in

Details Apparatus for determining the deviations from a circular form in Apparatus for determining the deviations from a circular form in

1985-05-28

1987-02-17

Martin, Jr., William D.

Geometrical instruments

Gauge

Internal

33550, 364560, G01B 728

Patent

active

046429026

ABSTRACT:
An apparatus for determining deviations of a circular form of a dynamically balanced part characterized by a spindle which can be set in approximate alignment with the axis of the unit under test, an interval sensor rotated around the spindle axis for radially sensing a circumferential surface of the unit under test and electronic signal processing unit for separating a deviation signal component of the sensor signal created by a deviation from the circular form that is detected from other signal components of the sensor signal which are created from an eccentric setting of the spindle with respect to the axis of the unit under test. As a result of such a signal analysis, errors occurring from the eccentric spindle setting are practically avoided. Thus, no high demands are made for the spindle setting when making, for example, a roundness check of a steel pipe.

REFERENCES:
patent: 3426437 (1969-02-01), Rebhun et al.
patent: 3649820 (1972-03-01), Totsuka et al.
patent: 3866829 (1975-02-01), Egawa et al.
patent: 4026031 (1977-05-01), Siddall et al.
patent: 4027527 (1977-06-01), Bennett et al.
patent: 4030201 (1977-06-01), Possati et al.
patent: 4070762 (1978-01-01), Siddall
Lexikon der Fertigungstechnik und Arbeitsmaschinen, Deutsche Verlags-Anstadt, Stuttgart, 1968, vol. 9, pp. 213-214.

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