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Physik Instrumente offers a piezo-based linear drive with drive forces up to 10N, velocities up to 0.5m/s and travel ranges of several tens of 10mm, for rectilinear motions in automation technology.

A piezo-ceramic actuator oscillating with ultrasonic frequencies is preloaded against a rod with linear guidance.

The oscillation profile of the actuator then produces the forward and backward motion of the drive.

The ceramic is preloaded against the rod and thus keeps it in its ‘at rest’ position when powered down.

Unlike electromagnetic linear motors, the piezo-based drive does not require any energy for this, no heat is dissipated and the position is maintained with a high degree of stability.

During positioning operations, the piezo-based linear drive with optical linear encoder achieves an accuracy of around 10um.

Moreover, in contrast to electromagnetic linear drives, the piezo-ceramic actuator does not generate any interfering magnetic fields when in operation.

The piezo-based linear drive has a matching controller with pre-integrated driver electronics to generate the ultrasonic oscillations; both controller and linear drive are designed for industrial applications.

This creates an attractively priced linear drive system which is also easy to integrate into the application.

The controller has a 100 mm wide and 160mm long eurocard which can be controlled via an RS232 interface, CAN or an analog input, as desired, for velocity control or external operation via joystick, for example.

The 32-pole multipoint connector can easily be connected up by means of adapter modules or screw terminals when the control cabinet is being installed.

Physik Instrumente

PI is a global manufacturer of high precision positioning systems and products based on piezo technology. Used in markets as diverse as biotechnology, semiconductor, defence and astronomy, PI’s products work to improve the speed and precision of many cutting edge processes. Actuators, sensors and positioning systems with either sub-micron or nanometre level precision; many customised for the end user, are included in the product range.

With manufacturing and subsidiary offices around the world and a workforce of more than 500 PI provides direct local support where it is needed. Products range from component level piezo ceramic assemblies to six axis hexapod positioning robots. PI manufactures its own piezo ceramic material including multilayer devices that incorporate its patented ceramic insulation technology. Lead free ceramic technology is now also included in the company’s product range. With the flexibility and continuity of supply offered by having control of piezo ceramic production comes security and speed of delivery for customers who rely on or are looking to move into this area of technology. PI’s piezo ultrasonic and step drive motor technologies offer unique performance including self-locking capability, high force or high speed and non-magnetic and vacuum compatibility.

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