Request InfoPI (Physik Instrumente) LP, Motion Control, Air Bearings, Piezo MechanicsPhysik Instrumente GmbH & Co. has introduced a piezoelectrically driven nanopositioning system for microscope turrets. The Powfoc turret-scanner provides subnanometer resolution, scanning ranges of 100 and 150 µm, and sufficient force for scanning the complete turret with several objectives. The positioner travels straight within 2 arc sec and has a settling time between 10 and 20 ms. The Powfoc's multilayer piezoelectric drive pushes a flexure parallelogram by an integrated lever mechanism. Position sensors provide feedback for closed-loop control. 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