These units are also unique among affordable nanopositioning controllers in providing two notch filters, allowing high-dynamic operation in situations where motion-driven ringing in the motion device and supporting structure would otherwise be problematic and require lower, less responsive gain settings.
E-709 provides advantages for autofocus applications, such as used in microscopy, industrial inspection, scanning, and genomics applications. It can interface in real time laser focus sensors, providing stable positions on the order of tens of milliseconds. It provides responsive real-time tracking, and it supports PI’s Fast Focus & Freeze capability, where the unit can be bumplessly switched from an external (focus) sensor to a position sensor in the piezo mechanism, allowing precise, high-stability motion with respect to the focal plane.
E-709 and E-727 provide a wealth of interfacing capabilities together with highly optimized software building-blocks. To begin, there are responsive USB, RS-232, and SPI interfaces on both. High-speed TCP/IP Ethernet connectivity for easy integration into automation and remote-access architectures from lab to fab is available on the E-727. Waveform generation and data recording capability are built-in and facilitate repetitive scanning and similar applications, offloading position generation from the host.
These controllers offer three real-time interfaces:
- Analog I/O interfaces, sampled/updated at the full servo cycle rate, provide easy integration with National Instruments’ multifunction cards, among other external command-signal possibilities. LabVIEW® users can even leverage this interface using PI’s Analog GCS (General Command Set) library — the industry’s first plug-and-play library for analog nanopositioning.
- A standard high-speed SPI interface offers the ability to communicate digitally using industry-standard physical protocols. You can command and interact with the systems servo update rate with no risk of loss or noise pickup in cabling.
- TTL I/O functionality allows triggering and synchronization with other host processes. These controllers utilize the same PI GCS command set as all PI controllers. This means programmers can write consistent code for coarse/fine applications, with the coarse positioner (like the ceramic motor-driven, self-clamping U-751/M-686 microscopy stage and its C-867 controller). Included with Nanopositioning controllers is a wealth of software tools ranging from an extensive LabVIEW® library, to an industrial-class Windows .dll and Linux .so libraries. A graphical setup and exploration software, called PIMikroMove, helps with system startup.
Special OEM Configurations
These digital nanopositioning controllers are also available without a case for embedded OEM applications. A version with only an analog position-command interface (E-609) offers special economy for backwards-compatibility applications, formerly served by analog controls.