The U-264KSPA linear actuator from PI (Physik Instrumente) is a self-locking drive that has been optimized for being produced in large quantities from engineering thermoplastics.
It features a 200mm travel range and a minimum incremental motion of 6µm. A linear encoder with 0.6µm resolution assures reliable position control and repeatable accuracy.
With the drive technology of PILine® ultrasonic piezo motors, velocities of up to 150mm/s and a maximum holding force of 6N can be achieved.
As piezomotors are self-locking at rest, no heat is generated and mechanical components such as brakes or gearhead can be dispensed with. As a result, the U-264KSPA ensures high positional stability.
The stiff design, direct coupling and fast response times of the piezo ceramics allow for a highly dynamic start/stop behavior.
What is the driving force of positioning systems with PILine technology?
PILine linear drives dispense with the mechanical complexity of classical rotary motor/gear/leadscrew combinations in favor of costs and reliability.
An integral part of the ultrasonic piezomotor is the piezo ceramics that is pretensioned against a movably guided runner via a coupling element. The piezo element is excited to high-frequency oscillations that cause the runner to move.
Preloading the piezoceramic actuators against the runner ensures self-locking of the drive when at rest and powered down. As a result, it does not consume any power, does not heat up, and keeps the position mechanically stable.
Especially applications with a low duty cycle that are battery-operated or heat-sensitive benefit from these characteristics.