U-651 Rotation Stage with Low-Profile Design

Stage with ultrasonic piezomotor and central aperture

PI U-651
Low profile: Only 14 mm in height
Positions larger loads quickly and with precision: Load to 20 N, closed-loop velocity to 540 °/s, minimum incremental motion to 12 µrad
Unlimited rotation range >360°
Drive torque to 0.3 Nm in both directions of rotation
Self-locking when switched off: Saves energy and reduces generation of heat
Central aperture for more fields of application
Vacuum versions available

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 piezomotor drive principle and its electrical operation is inexpensive and can be customized.

PILine® ultrasonic piezomotors

An integral part of a PILine® ultrasonic piezomotor 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.

Crossed roller bearings

With crossed roller bearings, the point contact of the balls in ball bearings is replaced by a line contact of the hardened rollers. Consequently, they are considerably stiffer and need less preload, which reduces friction and allows smoother running. Crossed roller bearings are also distinguished by high guiding accuracy and load capacity. Forced guiding of the rolling body cages prevents the roller bearings from creeping.

Valid patents

US patent no. 6,765,335B2

European patent no. 1267425B1

Fields of application

Micromanipulation, automation, biotechnology, sample manipulation, sample positioning, optical metrology, vacuum applications to 10-6 hPa (optional)

Specifications

pdf
pdf

Datasheet U-651

2017-07-07
2017-07-07
pdf - 778 KB
pdf - 786 KB

Drawings / Images

U-651 Drawing

Downloads

Datasheet

pdf
pdf

Datasheet U-651

2017-07-07
2017-07-07
pdf - 778 KB
pdf - 786 KB

Documentation

pdf

Short Instructions MP121EK

M-66x, M-68x, U-521, U-62x, U-651 PILine® Stages
4.3.0 2017-06-23
pdf - 709 KB
pdf
pdf

User Manual MP136

U-651 PILine® Rotation Stage
2016-10-25
2016-10-25
pdf - 2 MB
pdf - 2 MB

3-D Models

zip

U-651 STEP

English
zip - 708 KB