February 27, 2017 - PI has released the E-754 digital controller/driver, designed for closed-loop piezo mechanisms with capacitive position feedback sensors.
It provides a servo with 50 kHz update rate and 22-bit resolution. In addition to PID control, two programmable notch filters are integrated for higher bandwidth by suppression of mechanical system resonances. Digital linearization is based on 4th order polynomials to suppress linearity deviation to less than 0.01%. The Dynamic Digital Linearization (DDL) firmware option eliminates phase lag and dynamic non-linearities at high operating frequencies, such as used in scanning applications.
The driver provides 500mA peak current and -30 to 135V output voltage swing.
In addition to Ethernet (TCP/IP), SPI, USB, RS-232 communication interfaces, 4 I/O trigger lines and a high-resolution, 20 bit DAC analog command interface is also installed. A built-in data recorder allows capture of transients and optimization of servo parameters.
ID chip compatibility allows for start-up and interchangeability of controller and piezo mechanisms without recalibration, a critical feature for OEMs. The controller also comes with software support for LabVIEW and shared libraries for Windows and Linux.
Applications for the E-754 controller include nanopositioning, nano-automation, semiconductor technology, photonics, bio-nano-technology, metrology, microscopy, micro-manipulation, including cleanroom applications.
