The actual sample holder is located in the aperture of the rotation stage on the moving platform of a six-axis parallel kinematic SpaceFAB robotics machine. Essential features are the freely selectable pivot point of the parallel-kinematic system and its high stiffness.
The SpaceFAB clearly makes work easier for the researchers, since the small samples – only a few 10 to 100 micrometers in size – plus the holder can initially be inserted into the stage with low precision. They can then be aligned automatically using software commands, not requiring any additional mechanical components for correct alignment.
A six-axis parallel-kinematic machine of this type is also used for the positioning of the X-ray where compound refractive lenses (CRL), which were developed at the Institute of Microstructure Technology (KIT, Karlsruhe), Germany, are in use.