Dr. Johannes Heidenhain Gmbh

Thomas Jäger

Andreas Schroter

Josef Thaler

Alois Brandl

Dirk Ahrendt

Peter Eder

Waltraud Aichhorn

A scanning unit is arranged to scan a scale element that is rotatable about an axis relative to the scanning unit. The scanning unit includes a circuit board, which includes a substrate having a first surface, a second surface arranged opposite the first surface, and a circumferential third surface. A transducer system is arranged on the first surface, and electronic components are mounted on the second surface. The third surface includes a plurality of concave indentations. The scanning unit furthermore includes a metal frame having an uninterrupted first recess, which is radially restricted by an inner side of the metal frame, the inner side having a plurality of inwardly projecting elements. The inwardly projecting elements engage with the concave indentations such that the substrate is fixed in place in the metal frame under mechanical tension.

Scanning unit and rotary encoder equipped therewith

A method for assembling a position measuring arrangement for measuring a relative position of a first object with respect to a second object, wherein the position measuring arrangement includes a first unit movable in relation to a second unit of the position measuring arrangement, the method including fastening said first unit to the first object and fastening the second unit to the second object. The method further including adjusting a required scanning distance (A) between a scanning element of the second unit and a graduation of the second unit by applying a gauge to a first limit stop face of the first unit, as well as to a second limit stop face of the second unit. Prior to the fastening the first unit and the fastening the second unit, positioning and fixing either the first limit stop face on the first unit or the second limit stop face on the second unit in a direction of the required scanning distance so that the scanning distance (A) is optimally adjusted.

Position measuring arrangement and procedure for the assembly of a position measuring arrangement

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Trostberg, Germany

Thomas Jäger