Mad City Labs uses finite element analysis in the design process to verify proper flexure performance. Flexures combined with preloaded piezoactuators also eliminate backlash common to mechanical stages. Contrast this to the "slip stick" motion of standard mechanical stages containing slides and bearings or other piezo/friction based devices (such as "inchworm" motors). This unique characteristic provides highly repeatable motion which is independent of direction. Since flexure guided stages do not have parts which move against each other, they exhibit a complete lack of friction. By pushing on the stage center, pure linear motion is achieved. The hinges are extremely stiff in every direction except the direction of motion. Flexure testing is often done on relatively flexible materials such as polymers, wood and composites. An open-source, 3D-printed microscope, including a precise mechanical stage to move the sample and focus the optics. These hinges are shown schematically on the right of the figure. The EDM pattern shown results in four identical hinges at the corners of the stage. The hinges are formed by electrical discharge machining (EDM) and the stage and the frame are made from a single piece of metal. Its mid-century essence still has a whimsical. Since the piezoactuator is protected inside the flexure guided stage, mounting is much simpler and operation is safer.Ī typical flexure guided stage is shown above. New age, new innovation, and new ideas are all part of the process when creating our Flexure Collection. Welded construction, stiff flexure pivots, and precision adjustment screws provide excellent mechanical stability. a bend, turn, or fold flexural adj Collins English Dictionary Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014 flexure (flk r) n. Flexure mirror mounts are designed for set and forget OEM applications. With proper preloading, a pulling force can be generated, making a flexure guided stage useful for both pushing and pulling. the act of flexing or the state of being flexed 2. This effectively decouples the unwanted motions in the PZT actuator and produces a pure linear translation. Flexure guided stages, by proper design, restrict each axis of the stage to move in only one direction. Typical test results are: Strength testing of materials Calculation of the flexural stress and strain Flexural modulus Bending stiffness Flexural resistance. Additionally, while piezoactuators are excellent at pushing, they are very poor at pulling.Īll of the above problems can be overcome through the use of flexure guided stages. When mounting a piezoactuator, care must be taken to avoid damaging stresses. Piezoactuators are fragile and cannot tolerate shear forces. During expansion they twist and corkscrew, giving rise to unwanted motions. Understanding Noise at the Nanometer Scaleīy themselves, piezoactuators are of limited use as nanopositioning devices. Long Range Motion with Nanometer Precision Home Products Applications Catalog Custom/OEM Technical Information News International Sales Repairs Contact
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