Main-shaft malfunction-state detector in an air bearing type mac

Details Main-shaft malfunction-state detector in an air bearing type mac Main-shaft malfunction-state detector in an air bearing type mac

1998-08-03

2000-08-15

Noori, Max

Measuring and testing

With fluid pressure

Dimension, shape, or size

7386268, G01B 1308

Patent

active

06101866&

ABSTRACT:
A main-shaft malfunction-state detector in an air bearing type machine tool, in which an abnormal contact of a main shaft with a housing is reliably and automatically detected. The contacting state of the main shaft 11 and the housing 13 is detected through the presence of electric conductivity by a contact detection means 31. A contact decision means 32 determines the contact of the main shaft 11 with the housing 13 based on the detected conductivity, thus automatic and certain preventative measures, such as the main shaft of the machine tool stops and so on, are based on the above decision.

REFERENCES:
patent: 4433571 (1984-02-01), Snow, Jr.
patent: 4977777 (1990-12-01), Bieg
patent: 5174039 (1992-12-01), Murai
patent: 5311763 (1994-05-01), Gibbs, Jr. et al.
patent: 5748005 (1998-05-01), McCormick et al.

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