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Bearing Arrangement for Jerk Free Periodical Movements

IP.com Disclosure Number: IPCOM000083212D
Original Publication Date: 1975-Apr-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Bohg, A: AUTHOR [+2]

Abstract

For the jerk-free periodic movement of workpiece samples in a translational or reciprocating motion for the purpose of processing steps or tests, such as exposures, optical or radiological measurements, at least two carrier elements movable independently of each other are combined.

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Bearing Arrangement for Jerk Free Periodical Movements

For the jerk-free periodic movement of workpiece samples in a translational or reciprocating motion for the purpose of processing steps or tests, such as exposures, optical or radiological measurements, at least two carrier elements movable independently of each other are combined.

On a carrier surface S carrier C1 is movably guided. on whose surface another carrier C2 is arranged which is also movably guided. Carrier C2 carries probe P to be periodically moved to and fro. By drive D1, carrier C1 is moved to and fro at a relatively low frequency f1 in the direction of double arrow m1. By an independent drive D2 carrier C2 is moved to and fro at frequency f2, where f2 > f1, in the direction indicated by double arrow m2.

The jerks occurring during the movement of carrier C1 as a result of the mechanical bearing on carrier surface S and which lead to irregularities in the movement of carrier C1, are expanded on to a correspondingly large area by the movement of carrier C2. Movement of carrier C2 takes place at an essentially higher frequency and is superimposed on carrier C1 movement. Since the stroke of carrier C2 is long in relation to the magnitude of the inaccuracies in the bearing of carrier C1. the irregularities in the movement of carrier C2 together with probe P are no longer noticeable.

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