Scale plate arrangement
AssigneeSony Magnescale Inc.
InventorOsamu Ochiai
Life of this patent
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Abstract
A scale plate arrangement is adapted to be attached to a machine tool for detecting, for example, position and velocity of an object. The scale plate arrangement includes a scale-plate base and a scale plate which has a scale thereon. The scale plate is welded to the scale-plate base. With this, it is not necessary to use an adhesive or a fixing member to attach the scale plate to the scale-plate base. In case that the scale plate has a magnetic scale and that the scale-plate base is made of a magnetic material, the scale-plate base is formed with a recess which is positioned under the magnetic scale. With this, magnetic influence of the scale-plate base on the magnetic scale can be prevented.
Claims12
A scale plate arrangement comprising:
- a scale-plate base having a first surface, and
- a scale-plate having second and third opposite surfaces and having a scale on said third surface, said second surface of said scale plate being supported by and welded to said first surface of said scale-plate base, said first surface of said scale-plate base being welded along a longitudinal line on the third surface of the scale-plate, wherein said first surface of said scale-plate base and said second surface of said scale-plate are mutually opposing surfaces.
Dependencies are inferred from the claim text.