所谓天平带针，就是开启天平时，指针或微分标牌总是向一边摆动，然后才能恢复正常摆动，其原因有以下几个方面： １、两边刀缝隙不相等会引起带针。这种情况，一般都是由缝隙小一侧向缝隙大一侧带针。调修时，可调整支刀销使两边刀缝隙相等，其不等性应在０．１５ｍｍ－０．２ The so-called balance with a needle, that is, open the balance, the pointer or differential signs always swing to one side, and then to resume normal swing, the following reasons: 1, both sides of the knife gap is not equal to bring a needle. This situation is generally the small side of the gap to the side of the gap with a needle. Adjustments, the knife can be adjusted so that the gap between the knife on both sides of the knife, the inequality should be 0.15mm-0.2