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ANALYTICAL AND LABORATORY EQUIPMENT 37


Fig. 3. The hexapod can carry the entire measuring setup, including the structure where mechanical forces are applied – in this figure a chamber for the laser-welding of titanium aluminides. Image courtesy of the HZG.


delivers micrometre-precision positioning for loads of up to one tonne in every orientation. It stands ±20° approx. 700mm high and has a diameter of 800mm (top platform with large aperture) and 900mm (bottom). Te lower platform is installed on a 360° rotation table and the cabling was designed to be dragchain compatible. With its high load capacity of up to one tonne, the hexapod can carry the entire measurement setup including the equipment where mechanical forces are applied. Te hexapod positions even these large masses over distances of 400mm to a precision of ±1 micron, and performs rotational motions of ±20° with a resolution to 0.5 µrad. Inside the experimental hutch, this enables complete engine


blocks, turbine components, sinter furnaces and cryogenic chambers as well as welding fixtures or other machining units to be aligned precisely for the planned investigations and to be moved accordingly during the


analysis. Despite the high forces, the position reached is held in a stable manner; the brushless DC motors integrated in the hexapod struts are equipped with brakes.


For more information ✔ at www.scientistlive.com/eurola


Birgit Schulze is with Physik Instrumente (PI) in Germany. www.pi.ws


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