Unfortunately the sales of these Etel-controller was meanwhile stopped. New drive regulators have to be found, that on the one hand offer a comparable controller performance and on the other hand fullfil the demands of the present safety standards in drive engineering. That cannot be managed in a simple way.
M. Eng. Adrian Majewski, at that time still studying at the Fachhochschule Aachen, took that challenge as topic of his master thesis. He analysed the advantages and disadvantages of the controller by a state controller, as already used at Etel, and the usual cascade controller with speed servo control of other suppliers. The excellent presentation of theoretical relations of the controlled system and the different control principles as well as the simulation in LabVIEW and the successful analysis of suitability of some regulators of different suppliers bestowed the top grade 1.0 for his thesis. We would like to say thank you to Prof. Dr.-Ing. Ulrich Hoffmann for his excellent assistance. M. Eng. Adrian Majewski is meanwhile one of our staff.
We decided in favor of the servo regulator HCS01.1E of Bosch-Rexroth. This regulator disposes of a quick position and speed control as well as of the integrated safety technology „Safe Motion“.