Dr. Johannes Heidenhain Gmbh

Thilo Schlicksbier

Martin Von Berg

Tarek Nutzinger

Martin RÖTZER

A position-measuring device includes a housing having a first portion in the form of a hollow section and extending in a longitudinal direction. The housing includes at least a first passage and a second passage, the first and second passages each extending in the longitudinal direction at least partially through the first portion. A scale is disposed within the housing for being scanned as part of a position measurement. The position-measuring device includes a connecting channel, the first and second passages being interconnected via the connecting channel.

Position-measuring device

A method for checking position values using a monitoring unit to which position values of a position measuring device are supplied at time intervals of a query interval, includes: calculating a movement value from at least two position values and the time interval of their arrival; calculating an expected value for a position value to be checked that follows the at least two position values, by adding the most recent of the at least two position values and a change in position that results from the movement value and the time until the position value to be checked arrives; determining a position expectation interval from the expected value and a maximum position interval; comparing the position value to be checked to the position expectation interval; and outputting a signal that indicates the result of the comparison.

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Traunstein, Germany

Thilo Schlicksbier