Siemens Aktiengesellschaft

Hubert Bellm

Bernd-Markus Pfeiffer

Wolfgang Ens

Herbert Grieb

Dirk Abel

Ulrich Epple

Philipp Orth

Gerd-Ulrich Spohr

Peter Krüger

Dieter Kant

Ansgar Münnemann

To determine the backlash in an arrangement in which a motor moves a load via a transmission mechanism, a transducer is used which is present anyway in conventional production machines and which measures an angular position or translatory position of the drive element or a derivative of this quantity. Via the transducer the effect of the backlash on the actual position of the drive element is measured, the actual position being different from the desired position, which is defined by the forces or torques acting on the drive. On the basis of a frequency analysis, quantities can be derived which permit the use of threshold criteria. For example, the drive is driven with a periodic signal which is close to the absorber frequency, i.e. a frequency at which the absorption by the transmission mechanism is greatest.

Method for checking transmission backlash, and production machine or robot

The invention relates to methods and devices for developing programs for process control systems and in particular for mathematically intensive or, as the case may be, mathematically complex programs of said kind. According to the prior art programs of said kind were written in a separate development environment and subsequently the developed algorithm was re-implemented using a programming language available for the process control system and the associated compiler. The programming and testing were consequently both time-intensive and prone to error. It is proposed to split the overall algorithm into two parts when programming programs of said kind, a) the actual control algorithm by means of which the mathematical functionality of a controller is provided, and b) the algorithm by means of which the process control system-specific functionality of the above controller is provided. The second algorithm referred to runs in the process-oriented component of the process control system and the actual control algorithm in a computer suitable for industrial application. In order to control the process the two algorithms exchange data, the decision-making authority remaining at the control system level.

Development system for process control systems as well as associated method and computer program product

An inspection device for inspecting the solder paste printing on printed circuit boards. Three-dimensional surface structures ( ) are optically detected ( ) and the values of their geometric properties are calculated. The values thus measured are inspected ( ) for conformance to an absolute tolerance range. To fine-adjust the limit values, an operator has the option of evaluating the displayed defects as pseudo-defects, in which case the measured values are automatically accepted as the new limit values of the respective absolute tolerance range.

Device and method for inspecting a three-dimensional surface structure

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Stutensee, Germany

Hubert Bellm