C616A型提高精度的普通车床,系我厂所生产的320系列中的主要产品之一。它如按国家标准(GC)3-60规定精度检验第一项“溜板移动在垂直面内的不直度”之误差应以角度偏差(即水平仪读数法)来进行检验,但我厂历来执行着普通车床标准(GC)2-60所规定的以线性偏差(即坐标值法)的检验。根据推算,(GC)3-60和(GC)2-60在 C616A 车床上对该项精度 C616A type to improve the accuracy of the ordinary lathe, the factory produced by the 320 series of one of the main products. For example, according to the national standard (GC) 3-60, the accuracy test of the first item “error of vertical movement of slide plate ” should be checked by angle deviation (ie, the level meter reading method), but I The factory has traditionally performed tests based on the linear deviation (ie, coordinate method) specified in General Lathe Standards (GC) 2-60. Based on projections (GC) 3-60 and (GC) 2-60 on the C616A lathe this accuracy