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这是横梁的左右两臂不等长造成的.我们用的天平是等臂式天平,也就是横梁的中刀口到左右两边刀口的距离应相等.实际生产时制造出两臂绝对相等的横梁是极困难的.高精度天平的边刀虽可以微调,但也很难达到两臂绝对相等.学生天平边刀口是镶嵌在横梁的刀口槽里,无法调整,这就更难做到了对不等臂性误差规定为:在使用中允许在6个分度以内,新出厂或修理后只允许在3个分度以内.
This is caused by the unequal length of the left and right arms of the beam. The balance we use is an equal-arm balance, which means that the distance between the middle edge of the beam and the left and right edges should be equal. The actual production of two beams that are absolutely equal is Extremely difficult high-precision balance knife can be fine-tuned, but it is difficult to reach the absolute balance of the two arms. The edge of the student’s balance edge is embedded in the beam slot, can not be adjusted, which is even more difficult to achieve the inequality arm Sexuality error is defined as: In use, it is allowed to be within 6 graduations, and after the new factory or repair is allowed only within 3 graduations.