The constructional possibilities of modern machine engineering lead to ever larger and higher performance machines in the most diverse industrial fields. Movements have to be carried out more rapidly and efficiently. Part of this is also that machines and devices should provide more possibilities regarding functionality, while, if poossible, they should not increase in weight. It must be the objective of the designer to achieve functionality and nonetheless use materials economically, in order to keep the investments within limits and to maintain the necessary drive energy as low as possible. Energy consumption always means financial expenditure. Finally, for the investor the „Return on Investment“ has to be right.