+++ title = "Ultra Precision Bearings" author = ["Dehaeze Thomas"] draft = true +++ Tags : Reference : (Wardle 2015) Author(s) : Wardle, F. Year : 2015 ## Types of error motion {#types-of-error-motion} A distinction is made between: - motion errors that are harmonic of the basic rotor speed: synchronous motion error - those that are node: asynchronous motion errors