螺纹刀量具,丝杆……等,均有单个牙距偏差和累积误差的要求。牙距有整数牙距和非整数牙距两种。整数牙距计算错了易检查,故这里只谈非整数牙距计算是否有误的检验方法。牙距偏差值和累积误差值的计算距是用简单的加减法,由于计算步骤多(仪器读数依次记录、单个牙距值的计算、单个牙距偏差值的计算、单个牙距偏差值累积等)。牙距数量有几个,有几十个,也有上百个的。牙距数量少, Threading tools, screw rods, etc., have a single pitch deviation and cumulative error requirements. Tooth spacing is an integer tooth pitch and non-integer tooth pitch two. Integer tooth distance calculation error easy to check, so here only talk about non-integer tooth pitch calculation is wrong test method. The calculation of the distance between teeth and the value of accumulated error is done by simple addition and subtraction because of the large number of calculation steps (recording of instrument readings in turn, calculation of single pitch value, calculation of single pitch deviation value, accumulation of single pitch deviation value Wait). There are a few teeth, there are dozens, there are hundreds of. A small number of teeth,