Why All Piezo Motors are NOT Created Equal: The piezoelectric effect for precision motion control - PI Physik Instrumente.
capacitive bridge. One plate is fixed, the other plate is connected to the object to be positioned (e.g., the platform of a stage). The distance between the plates is inversely proportional to the capacitance [...] properties, the bandwidth of the nanopositioning system (mechanics and servo) matters. A slow system (e.g., 100 Hz resonant frequency) will not benefit from a responsive interface as much as a high-speed [...] n schemes not feasible with analog servos. Learn more on digital and analog servo controllers PI’s E-709 closed-loop piezo controller makes digital servo technology affordable. It is available for strain