Siemens Aktiengesellschaft

Martin Teckentrup

Wolfgang Papiernik

Ulrich Hahn

Markus Gross

Gerhard Pfaff

Peter Jaenicke

Oswald Kaesdorf

For real-time communication between a number of network subscribers in a communication system using Ethernet physics, the slave units are synchronized to the master unit in that each slave unit is clocked via a respective timer with a predetermined overall cycle time, which timer is set cyclically by the reception of respective slave-specific synchronization information which is determined by the master unit. In this case, each timer in a slave unit automatically starts a new cycle once the predetermined overall cycle time has elapsed, even in the absence of the respective synchronization information. Access control for the transmission mode and reception mode between the network subscribers is provided using a timeslot access method.

Method for real-time communication between a number of network subscribers in a communication system using ethernet physics, and a corresponding communication system using ethernet physics

Control of machine tools and industrial robots is usually implemented in a cascade structure, having not only numerous advantages but also the fundamental disadvantage of lower dynamics in the response to set point in comparison with a single control loop. This disadvantage is compensated today by feed-forward control concepts which permit ideal tracking of the controlled variable without intervention by the controllers, apart from inaccuracies in modeling of the controlled system or disruptions. The enormous computation complexity of these precontrol methods in higher order systems has provided the motivation for the development of a cartesian path control concept which is described in the present invention. While retaining the cascade structure, path accuracy can be improved significantly in comparison with axial feed-forward concepts.

Control method and numerical control for motion control of industrial machine tools

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Zirndorf, Germany

Martin Teckentrup