Dr. Johannes Heidenhain Gmbh

Johannas Heidenham Gmbh

Herbert Reiter

Wolfgang Holzapfel

Jörg Drescher

Mathias Hausschmid

Herbert Huber-Lenk

Johann Streitwieser

Erich Strasser

Rainer Hagl

In a device and a method for coordinate measurement, a probe head generates a switching signal in response to contact with a workpiece. The device includes position-measuring units for each coordinate axis to be measured, with the aid of which the relative position of the probe head is measurable; and a processing unit, which operates in a discrete-time manner in time intervals of a controller clock signal. For coordinate measurement, position-measuring values are measured in time intervals of a probing clock signal, which is generated by a probing clock generator and has a higher frequency than a controller clock signal of a processing unit. The position-measuring values are stored in a position-data memory. A time span between a pulse of the controller clock signal and the occurrence of the switching signal at the switching probe head is measured in a time-measuring unit. With the aid of the measured time span, the position value in the position-data memory closest to the time of the switching signal is ascertained in the processing unit or in the position-measuring units.

Device and method for coordinate measurement

A method for position determination that includes generating first and second position-dependent scanning signals, transmitting the first and second position-dependent scanning signals from a scanning location via corresponding first and second scanning channels to corresponding first and second storage elements, storing corresponding first and second instantaneous values present at the first and second storage elements at corresponding first and second storage times. Forming a measured position value from the first stored instantaneous value and the second stored instantaneous value. A difference exists between corresponding first and second transit times of the first and second position-dependent scanning signals in the corresponding first and second scanning channels, the difference is compensated by individually delaying the first and second position-dependent scanning signals, so that the stored first and second instantaneous values have appeared at a common time at the scanning location.

Method for determining a position and position measurement device for carrying out the method

A position measuring system that includes a scale and a scanning device that scans the scale. A light source, which emits a light pulse upon receipt of a request signal and an optical fiber that transmits the light pulse from the light source to the scanning device and for illuminating the scale. At least one photo detector that detects the light pulse affected by the scale as a function of its position.

Method for measuring position and position measuring device for carrying out said method

A method for position determination in a position measuring device that includes digitizing analog position data from a detector unit within time intervals of an internal clock rate and calculating position data from the digitized data. Determining a period of time &#x394;t between a pulse of the internal clock until an appearance of an external trigger signal and a processing of at least two position data, together with the period of time &#x394;t.

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Garching/Alz, Germany

Herbert Reiter