Measuring instrument

Details Measuring instrument Measuring instrument

1984-09-21

1986-02-25

Dobeck, B.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

356375, 250237G, G05B 106

Patent

active

045730008

ABSTRACT:
In an incremental measuring instrument for measuring the relative position of two objects, of the type including reference marks absolutely positioned with respect to a graduation of a scale, a first scanning plate with scanning fields for the graduation is provided in a scanning unit which is shiftable on a guide independent of the guide of the objects to be measured. The second scanning plate is connected to the first scanning plate by means of a coupling which is rigid in the measuring direction. In this way the separation of the first and second scanning plates with respect to the scale can be adjusted independently for optimal scanning of both the graduation and the reference marks.

REFERENCES:
patent: 2694804 (1954-11-01), Wagner
patent: 4074131 (1978-02-01), Schwebel
patent: 4295742 (1981-10-01), Nell et al.
patent: 4297033 (1981-10-01), Nelle et al.
patent: 4403859 (1983-09-01), Ernst
patent: 4462159 (1984-07-01), Nelle
patent: 4490914 (1985-01-01), Spies
patent: 4492032 (1985-01-01), Nelle
patent: 4527056 (1985-07-01), Burkhardt et al.

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