piezosystem jena`s new nano-positioning stages of the series nanoX work in a bidirectional active manner. Hence, these elements are well equipped for fast dynamic applications combined with an excellent guiding accuracy even at high mass loads.
What does this mean? Due to the inability of the smca (stacked multilayer ceramic actuator) to generate pull forces, state-of-the-art piezoelectric driven nanopositioning actuators show different kinds of behavior depending on the sense of direction of their stroke. Hence, the resulting forces in the push direction are determined by the high force generation of the actively controlled smca. The pull force is determined by the weak spring reset force of the passive acting flexure hinges. Both result in a push/pull-force ratio of up to 10. The dynamical performance, load capacity and robustness of the whole nanopositioning assembly are limited by the behavior of the weaker sense of direction.
piezosystem jena´s new sophisticated gear design operates in a bidirectional active manner which reduces the push/pull-force ratio to up to approx. 1:1 (without affecting the trajectory). Both stroke vectors of the nanopositioning stage are controlled by the high pressure force generation of the smca´s.
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