To do this, the monotone curve is firstly drawn, and then without finding the coordinate of the inflexionpoint, the NC machining path can be obtained by the method of automatic direction control.
首先对单调NC轨迹曲线进行绘制，进一步用不求极值点坐标而实现自动控制变向的方法，求出NC加工轨迹；
2
The inflexion circle and Ball point were obtained under the finite approach state of mechanism movement position.
在机构运动位置的有限接近状态下，得到拐点圆及鲍尔点。
3
The point of minima value and the point of inflexion are two common concepts of derivative.