Why is friction tape needed?

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It is the friction between piezo elements and rotor that translates the traveling wave on stator into a rotational force on rotor.

To ensure sufficient friction a friction tape is mounted on rotor. We’ve had good experience and results using H-old: GL.96.glass fiber enforced adhesive tape with an alu layer.

Apart from ensuring the required friction properties, the tape also prevents acoustical noise.

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