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PI is a leading manufacturer of precision motion control and automation systems, hexapod 6-axis parallel robotic stages, air bearing motion systems, Gantry Systems, 3D printing, laser machining, and piezoelectric nano-positioning solutions. Applications include photonics, semiconductor technology, medical engineering, assembly, inspection, materials handling, and bio-nanotechnology. PI has been developing and manufacturing standard & custom precision products with piezoceramic and electromagnetic drives for 4 decades and provides innovative, high-quality solutions for OEM and research including industrial motion controllers (ACS). The PI group employs more than 1,300 people worldwide in 15 subsidiaries and R&D / engineering centers on 3 continents. ISO 9001 certified since 1994.

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How does a Piezo Ratchet Mechanism Work in a Closed-Loop Precision Actuator?

POSTED 06/07/2019

Piezo Ratchet Motors are inertia motors based on the stick-slip effect. A small piezo ceramic actuator embedded in a precision mechanism drives a high resolution screw. An optical encoder reads position changes and feeds the information back to a closed-loop controller. Resolution in the nanometer rage is feasible, self-locking design with high holding forces compared to the compact size.