U-628 Miniature, High Speed, Closed-Loop Rotary Stage from Physik Instrumente

The U-628 from Physik Instrumente features an integrated optical encoder for direct metrology. It has an unlimited rotation range, a reference point switch and a central clear aperture with 7 mm diameter.

Oscillating piezoceramic actuators act directly on the ring-shaped runner. It also has a high velocity and a holding torque of 0.1 Nm.

Key Features

The key features of the U-628 are:

  • Side length 50 mm
  • Integrated position encoder
  • High velocity >1000°/s
  • Unlimited rotation rang


The applications include sample handling and positioning in research and industry for installations limited in space with the vacuum version being optional

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