Scanning system of a position measuring device
AssigneeDr. Johannes Heidenhain GmbH
InventorsWolfgang Pucher, Reinhard Mayer, Stefan Kuhnhauser
Life of this patent
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Abstract
A scanning system of a position measuring device for photo-electric scanning of a measuring graduation, the scanning system including a support carrying measuring components, an adapter including a scanning graduation in a graduation plane and a holder that holds the support on the adapter. The holder is structured so that the support is stationarily positioned on the adapter in six degrees of freedom, but compensates thermally caused expansion of the support in relation to the adapter in a first coordinate direction and a second direction which define the graduation plane.
Claims17
A scanning system of a position measuring device for photo-electric scanning of a measuring graduation, the scanning system comprising:
- a support carrying measuring components;
- an adapter comprising a scanning graduation in a graduation plane;
- and
- a holder that holds said support on said adapter, wherein said holder is structured so that said support is stationarily positioned on said adapter in six degrees of freedom, but compensates thermally caused expansion of said support in relation to said adapter in a first coordinate direction and a second direction which define said graduation plane.
The scanning system in accordance with claim 9, wherein said material is a glass-ceramic material.
A position measuring device comprising:
- a measuring graduation;
- and
- a scanning system for photoelectrically scanning said measuring graduation, said scanning system comprising:
- a support carrying measuring components;
- an adapter comprising a scanning graduation in a graduation plane;
- and
- a holder that holds said support on said adapter, wherein said holder is structured so that said support is stationarily positioned on said adapter in six degrees of freedom, but compensates thermally caused expansion of said support in relation to said adapter in a first coordinate direction and a second direction which define said graduation plane.
Dependencies are inferred from the claim text.