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一、现象扫描时，扫描架内突然发出阵阵刺耳的尖叫声。二、检查打开扫描架右侧盖板，用手推动扫描架旋转，发现顺时外转动有噪声，且噪声的频率大小和转速成正比，而反时针旋转却没有噪声。由于扫描架内部结构复杂，零部件繁多，我们首先从最容易引起噪声的转动部件开始寻找噪
1. During the scan of the phenomenon, an irritating squeak suddenly occurred in the scan frame. Second, check open the right side of the scan frame cover, hand to push the rotation of the scan frame and found that the clockwise rotation is noisy, and the frequency of the noise is proportional to the speed and rotation, but no counterclockwise rotation noise. Due to the complex internal structure of the gantry and the large number of parts, we first started to look for noise from the rotating parts that are most likely to cause noise.