Fast, Powerful and Durable: New Piezo Walking Drive - Nanometer Precision Positioning in Industrial Applications

Faster, more powerful, and more durable piezo walking drive, e.g., for precision positioning of larger optics, detectors or camera set-ups in industrial applications (Source: PI)
(PresseBox) ( Karlsruhe, )
If large optics, detectors or camera set-ups in industrial applications need to be positioned with nanometer precision, drive solutions are necessary that not only work with the required precision, but can also withstand the high continuous load. The solution supplier of drive technology and positioning systems, Physik Instrumente (PI) has added PICMAWalk walking drives to its extensive product portfolio for those types of applications (image 1).

PICMA® actuators aligned in the shape of a V ensure a reliable and very exact feed motion with a holding force of at least 60 N, 50 N push/pull force, and a velocity up to 15 mm/s. Loads up to 5 kg can then be positioned with exact nanometer precision. Runner lengths are variable between 25 and 100 mm. The reliable liftoff behavior of the actuators in conjunction with exactly matched flexure guides guarantees a long lifetime. During field tests, the value specified in the datasheet of 30 km for the travel path was exceeded by more than threefold. Because of the modular design of the drives, it is possible to adapt them to customer-specific requirements quickly and inexpensively.

The new walking drives combine the already familiar walking principle (image 2) of the NexLine® and NEXACT® drives with the high reliability of the standard PICMA® actuator series.

PICMA® actuators have all-ceramic insulation and are therefore superior to conventional, non-ceramic insulated actuators both in performance and lifetime. The ceramic insulation layer protects the monolithic piezoceramic block against humidity, and failure due to increased leakage current, and therefore achieves high motion cycles under extreme ambient conditions. In contrast to electric motorized drives, there are no rotating parts or friction. The piezo actuators are therefore free of backlash, maintenance, and wear.

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