跳针与带针往往会影响天平的变动性 ,严重时还会使天平无法使用 ,笔者从多年检测检定实践中 ,积累了一些经验 ,现在谈谈天平跳针与带针的原因及调修方法。一、跳针当开启天平时 ,从侧面观察指针向前或向后跳动 ,其主要原因 :(1)中刀刃与中刀承之间的间隙 (即中刀缝 )前后宽度不 Skipping needles and needles often affect the balance of the changes in the balance will make the balance unusable, the author from many years of testing and verification practice, accumulated some experience, and now talk about the reasons for the balance jumper and needle with the repair method . First, skip when open the balance, from the side of the pointer to observe the forward or backward beating, the main reason: (1) in the blade between the knife and the gap between the center (that knife gap) before and after the width is not