Piezo controllers come with special software for tuning, optimization, and programming of motion paths or patterns in one or more degrees of freedoms. PI nanopositioning stages are delivered with preconfigured operating parameters. The best parameters, found in the factory during the calibration probes, are stored on the controller in an ID chip and are automatically uploaded to the controller when connected.
Modern digital piezo controllers are superior to analog controllers and the latest designs provide digital and analog control inputs, high speed EtherCat, SPI interfaces, and simple analog interfaces for user communication. The closed-loop nanopositioning controller compares the feedback signal of the piezo stage integrated sensor and automatically adjusts the output voltage until the desired position is achieved. This happens in milliseconds. -Closed-loop piezo controllers increase stiffness and eliminated hysteresis effects and creep effects known from open-loop piezo actuators.
Long travel piezo stages can achieve travel to 2mm and piezo motor stages can achieve hundreds of millimeters.
Flexure guided stages often use amplified piezo actuators to provide longer travel than a piezo stack would usually provide. The latest patented PICMA® piezo actuators were tested to last over 100 Billion Cycles for the Mars mission and provide superior reliability in industry and space applications. When flexures are designed with proper experience and Finite Element Analysis (FEA), they can virtually last forever.
PI provides piezo Nanopositioners in hundreds of different sizes and configurations, many shapes and sizes, used in a variety of applications from semiconductor metrology to fast dispensing.