PILine ultrasonic piezo drives offer an affordable alternative to electromagnetic linear motors and motor-leadscrew combinations when small dimensions and/or high speed are important.

With velocities of up to 200mm/s, these drives are fast, compact and readily integrated.
In addition, PIline motors are self-locking at rest with zero heat generation, eliminating the need for an additional motor brake.
PI’s M-272 is a linear actuator designed for automation applications based on a maintenance-free PILine ultrasonic ceramic motor.
The M-272 closed-loop linear drive combines motor, actuator, linear encoder, guiding system and brake functionality in a very compact package.

Due to the integrated guiding system, a payload can be easily attached to the drive rod of the M-272 drive and positioned precisely.
The M-272 features a maintenance-free ceramic linear motor, has travel range of 50mm and 5um resolution with integrated linear encoder.
It is self-locking at rest, with no need for external brakes and no energy consumption.

PILine piezo motors are based on a new, patented, ultrasonic drive principle developed by PI.

Through its contact with the ceramic friction bar (runner), the moving part of the mechanical system is pushed along.

With each oscillatory cycle, the mechanical system executes a minute step of only a few nanometers and the macroscopic result is smooth motion with a virtually unlimited travel range.

The piezo ceramic plate is preloaded against the runner and thus generates the holding force when the drive is at rest.

Its highly specialized DSP handles all of the motion properties typical for ultrasonic piezomotors, such as dynamic control parameter adaption.
Optimized settling behavior of the mechanics within 10s of milliseconds is achieved by automatically switching between gain-sets for dynamic and static operation.

Physik Instrumente
www.physikinstrumente.com