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机械振动从低频到高频都存在。和回转机械发生异常时的振动一样，如存在失衡、偏心、松动、摆动等异常，低振动数领域的振动将变大。VM－70的测定模式：LOAVE便是用于诊断此类低振动数领域出现的异常现象为目的的。滚柱轴承的内、外轮或转动体如有损伤，受到主轴回转时的接触，
Mechanical vibration exists from low frequency to high frequency. As in the case of abnormal vibrations of rotating machinery, if there is an abnormality such as unbalance, eccentricity, looseness, swinging or the like, vibrations in the field of low vibration will become larger. VM-70 Assay Mode: LOAVE is used to diagnose the anomalies in the field of low vibration. Roller bearing inner and outer wheels or rotating body if damaged, by the spindle rotation contact,