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With the N-216 series Nexline drives, PI is offering high-load linear actuators that combine travel ranges of 20mm, pull or push forces of up to 600N and positioning accuracies in the nanometer range.

They are suitable for open-loop and closed-loop operation.

The integrated encoder of the versions that can be operated in closed-loop mode has a resolution of 5nm over the total travel range.

In open-loop mode, position resolutions of up to 30 picometers are achieved.

In order to make the best possible adjustment of the drives to the relevant application, two different controllers are available.

The E-755 offers all functions for a positioning with nanometer accuracy and covers most applications well.

The E-712 controller system has improved linearisation algorithms for steady motion and allows faster feed-forward motions with maximum force.

The Nexline drives produce the feed forward using a combination of longitudinal and shearing piezos – piezo actuators with different motion characteristics.

If they are driven appropriately, clamping as well as driving motions can be realised and the load can be moved with constant speed over the total distance.

In this way, the position can be actively readjusted after the target position is reached.

This can be used to compensate vibrations.

Since the drives have no moving parts, such as gears or leadscrews, there is no mechanical play and no wear.

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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