PiezoMotor in Uppsala, Sweden, is proud to present the new Piezo LEGS rotary motor, LR17 with an integrated encoder. We have seen a significant increase in sales of our rotary type motors and therefore take the opportunity to introduce a new motor to broaden the range. The LR17 is our smallest rotary motor yet, and the first in a new series of rotary Piezo LEGS motors with integrated absolute encoders. The motor will be available for deliveries from June 1st.
This small compact designed motor (17 mm diam.) has all the benefits coming from the Piezo LEGS technology. The stall torque from the motor is 30 mNm, which is high compared to its small size. Because of the self‐locking feature of the friction drive, the motor can hold position without consuming any power. The integrated 15 bit magnetic absolute encoder gives a closed loop resolution of 0.2 milli‐radians (0.01º), and as always with the Piezo LEGS technology, you get an amazing sub‐micro‐radian resolution in open loop.
Vibrations and Sounds of Electric Microdrives There are specifications for large electric machines and drives that dictate how the noises and vibrations they produce should be measured and assessed. On its own, a microdrive is considered to be ultra-silent due to its small dimensions, while its vibrations are generally not seen as troublesome. Such drives are therefore generally first noticed within the context of the device to which they are attached or installed in and often only then subjectively assessed. Many engineers and technicians regularly have to deal with acoustical issues stemming from the electrical microdrives installed in the products they have developed. The FAULHABER reference book "Vibrations and Sounds of Electric Microdrives", now available in English, should provide assistance in efficiently and effectively approaching vibration- and acoustics-related issues. Furthermore, it should provide a common basis for discussing sound-related issues and act as a foundation for constructive communication between customers and suppliers. The book is based on practical industrial experience and is therefore better classified as a practical handbook than an instructional textbook.
The book is available from: Süddeutscher Verlag onpact GmbH ISBN 978-3-86236-035-2
Applied environmental protection underground Modern civilization cannot do without a working wastewater system. It is important that contaminated water makes its way safely to the sewage treatment plant. As many drainage systems and household pipe connections are now decades old, they often need to be repaired or replaced. Expensive repairs can be precisely planned and restricted to the affected areas by first conducting an underground video inspection. Microdrives facilitate complete mobility of the camera head of such inspection devices, ensuring optimal coverage of all sections of the drain and delivering a panoramic view to the camera operator. Compact dimensions are important for all components of the inspection system to ensure even narrow drains and thin pipes are properly checked.
This small compact designed motor (17 mm diam.) has all the benefits coming from the Piezo LEGS technology. The stall torque from the motor is 30 mNm, which is high compared to its small size. Because of the self‐locking feature of the friction drive, the motor can hold position without consuming any power. The integrated 15 bit magnetic absolute encoder gives a closed loop resolution of 0.2 milli‐radians (0.01º), and as always with the Piezo LEGS technology, you get an amazing sub‐micro‐radian resolution in open loop. 
