The U-624 is a miniature rotation stage with an ultrasonic piezo motor for fast, precise positioning in micromanipulation and optical metrology. It has a 30 mm edge length and 12 mm height, with unlimited rotation beyond 360° and a maximum angular velocity of 720 °/s. Drive torque is up to 0.01 N·m, and the stage is self-locking when off. An incremental optical encoder with 35 µrad resolution and an optical reference switch ensure repeatable motion. It uses ball bearings, supports a maximum push force of 1 N, weighs 130 g, and is made of anodized aluminum. Operating temperature is 0 to 40 °C. The stage connects via a 1.5 m cable with a D-sub 15 (m) connector.
Precision-class rotation stage
PILine® stages are particularly suitable for applications that require fast precision positioning. When switched off, the self-locking drive holds the position of the stage mechanically stable. Energy consumption and heat generation is therefore considerably reduced. Applications with a low duty cycle that are battery-powered or heat-sensitive benefit from these characteristics. The position of the axis is measured by an encoder and an optical reference switch allows reliable repeatable motion. The piezo motor drive principle and its electrical operation is inexpensive and can be customized.
PILine® ultrasonic piezo motor
An integral part of a PILine® ultrasonic piezo motor is a piezo actuator that is preloaded against a movable, guided runner via a coupling element. The piezoceramic actuator is excited to ultrasonic oscillation by a high-frequency AC voltage between 100 and 200 kHz. Deformation of the actuator leads to periodic diagonal motion of the coupling element relative to the runner. The feed created is a few nanometers per cycle; the high frequencies lead to the high velocities. Preloading the piezoceramic actuator against the runner ensures self-locking of the drive when at rest and switched off.
Direct position measurement with incremental encoder
Noncontact optical encoders measure the actual position directly at the motion platform with the greatest accuracy so that nonlinearity, mechanical play or elastic deformation have no influence on position measuring.
Valid patents
US patent no. 6,765,335B2
European patent no. 1267425B1
Fields of application
Micromanipulation, automation, biotechnology, sample manipulation, sample positioning, applications with limited space, vacuum applications to 10-6 hPa (optional)
| PI (Physik Instrumente) L.P. | |
|---|---|
| Product Category | Rotary Stages |
| Product Number | U-624 |
| Product Name | Fast Miniature Rotation Stage |
| Stage Type | Rotary Positioning |
| Drive Mechanism | Direct Drive |
| Output Feedback | Home Switch; Table Position |
| Load Capacity | 4.5 lbs (2.04 kg) |
| Rotary Velocity | 720 deg/sec |
