A method of making radius sample board accurately for inspecting mag nified drawing is presented by moving Cartesian coordinates and rotating to dete rmine the points on arc with universal tool microscope in its working limit rang e.

• 通过直角坐标系的平移、旋转确定圆弧上点的方法,提出了在万能工具显微镜上利用其有限工作行程,精确绘制半径样板圆弧检测放大图的方法。