实践经验,内径百分表杠杆机构的误差,在不少场合可以不对a点进行修整,而采取掉换一只百分表头的方法,即掉换一只误差曲线大致与内径百分表相反的表头,使表头的误差能抵销一部分内径百分表90°杠杆的误差,以此来代替钳工修理。应当指出,在应用这种方法时,为了检测出杠杆机构的误差曲线,应当使用一只标准的 Practical experience, the internal diameter dial indicator lever mechanism error, in many occasions can not trim point a, and take a swap for a dial indicator method, that is, an error curve is roughly the opposite of the internal diameter dial indicator Head, so that the head of the error can offset part of the diameter dial 90 ° lever error, as a substitute for fitter repair. It should be noted that in applying this method, in order to detect the error curve of the lever mechanism, a standard