Patent ID: 6085429
Filing Date: 2000-07-11
Classification: G01B

Abstract:
A test apparatus for testing the straightness of an optical disc spindle of the type having first and second ends disposed at opposite ends of a longitudinal axis, the test apparatus comprising:(a) a rotatable spindle support, configured to rotate about a rotational axis and support the first end of the optical disc spindle with the longitudinal axis thereof extending generally along the rotational axis;(b) a proximity sensor, disposed at a fixed location relative to the rotational axis of the rotatable spindle support and configured to output a variable proximity signal associated with the distance between the proximity sensor and the optical disc spindle; and(c) an electrical circuit, responsive to the proximity signal and configured to indicate if the distance between the proximity sensor and the optical disc spindle falls outside an acceptable range during rotation of the rotatable spindle support.