Position measuring arrangement and method for controlling...

Details Position measuring arrangement and method for controlling... Position measuring arrangement and method for controlling...

2006-06-08

2008-08-19

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

Position or displacement

C356S616000, C356S620000

Reexamination Certificate

active

07414736

ABSTRACT:
A method for controlling a scanning signal of a light-electric position measuring arrangement, the method includes in a first mode of operation providing the scanning signal to a control device and the control device comparing an amplitude of the scanning signal with a predetermined level and makes a differentiation as to whether the amplitude lies above or below the predetermined level. In a second mode of operation the method includes reducing the amplitude of the scanning signal by attenuating light within a light beam path, and the reduced amplitude is compared with the predetermined level and generating an indication which is suitable for controlling a basic setting of a scanning head relative to a scale.

REFERENCES:
patent: 4432640 (1984-02-01), Grage et al.
patent: 5241173 (1993-08-01), Howley et al.
patent: 5604590 (1997-02-01), Cooper et al.
patent: 6973355 (2005-12-01), Tisue
patent: 2004/0026603 (2004-02-01), Burgschat et al.
patent: 0 514 081 (1996-02-01), None

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