Ultrasonic piezomotors are small and provide motion with high resolution, as well as an extremely wide dynamic range from microns/second to 100’s of millimeters/second. A significant advantage over magnetic drive technologies (such as voice-coils, brushless and 3-phase motors, also offered by PI) is the self-locking principle: once the motor reaches a target position, it acts like a ceramic brake and locks the platform into place providing extreme long term stability at zero driving current and heat generation.
Mobil / Integration: Due to their low power requirements, ultrasonic motors can also be integrated into mobile measuring and medical devices.
Compact and Fast: With the U-521, PI (Physik Instrumente), has now added a compact linear stage to its portfolio with dimensions of 35×35×15mm, similar to the size of a matchbox. The compact design allows easy integration, even when space is limited. In addition to the high speed up to 200 mm/sec, the low inertia (direct drive no rotating parts) allows for a very dynamic start-stop behavior with settling times in the milliseconds.
Watch Video Explaining Drive Principle >
Precision – Closed-Loop: An integrated optical linear encoder provides position feedback with 100 nanometers resolution. Higher resolution versions are available for OEMs.
Applications: Typical application fields can be found in industry and research, for example, automatic micromanipulation, positioning of samples or when adjusting optical components, such as objectives and camera lenses. Vacuum-compatible versions (to 10-6 hPa) are also available.
Multi-Axis: Two stages can be combined to an XY-setup – no need for an adapter plate.
Rotation: The linear stage is complemented by a number of miniaturized closed-loop rotary stages with diameters from 20 to 50mm.
Patented Drive Principle: A compact piezoceramic plate oscillates at 100’s of kHz (inaudible to human ears). Each cycle transfers a nanometric displacement onto a ceramic runner coupled to the moving carriage. No energy is consumed at rest, no heat to be dissipated, and the servo jitter is eliminated.
Standard and Custom
PI has in-house engineered solutions with over 4 decades of experience working with customers to provide products that meet application demands, and can quickly modify existing product designs or provide a fully customized OEM part to fit the exact requirements of the application.
SOURCE: PI (Physik Instrumente)