数控技术及应用教案及讲稿 上部分：数控技术及编程 表2-4逐点比较法圆弧插补过程 序号偏差判别坐标进给 偏差计算 终点判别 F。=0.x。=5.y=0 ∑=5+5=10 1F。=0 -Ax =。-2×5+1=-9,x1=5-1=4,y=0 ∑=10-1=9 2F0 +△y F3=F+2×0+1=-8x2=4,y2=0+1=1 ∑=9-1=8 3F0 +Ay F3=F3+2×1+1=-5,x3=4,y3=1+1=2 =81=7 4F0 +△V F=F3+2×2+1=0,x,=4,y4=2+1=3 ∑=7-1=6 5 F=0 -4x F=F-2×4+1=-7,x3=4-1=3,y=3 ∑=6-1=5 6 F(0 +Ay F。=F+2×3+1=0,x6=3,y6=3+1=4 >=5.1=4 7 F=0 -Ax F,=F。-2X3+1=-5,X,=3-1=2,y2=4 ∑=41=3 8F,0 +△y F=F,+2×4+1=4,x=2,8=4+1=5 ∑=3-1=2 9F)0 -△X F。=F-2×2+1-1,x。=2-1=1,。-5 ∑=2-1=1 、10 F)0 -Ax F0=F-2×1+1=0,x0=1-1=0,0=5 =1-1=0 图2-18逐点比较法圆弧插补轨迹 兰州交通大学机电工程学院数控技术及应用教案及讲稿 上部分：数控技术及编程 兰州交通大学机电工程学院 8 表 2-4 逐点比较法圆弧插补过程 序号 偏差判别 坐标进给 偏差计算 终点判别 F0 = 0, x0 = 5, y0 = 0  =5+5=10 1 F0 = 0 -  x F1 = F0 − 25 +1 = −9, x1 = 5 −1 = 4, y1 = 0  =10-1=9 2 F1 0 +  y F2 = F1 + 20 +1= −8, x2 = 4, y2 = 0 +1=1  =9-1=8 3 F2 0 +  y F3 = F2 + 21+1 = −5, x3 = 4, y3 =1+1 = 2  =8-1=7 4 F3 0 +  y F4 = F3 + 2 2 +1 = 0, x4 = 4, y4 = 2 +1 = 3  =7-1=6 5 F4 = 0 -  x F5 = F4 − 2 4 +1 = −7, x5 = 4 −1 = 3, y5 = 3  =6-1=5 6 F5 0 +  y F6 = F5 + 23+1 = 0, x6 = 3, y6 = 3+1 = 4  =5-1=4 7 F6 = 0 -  x F7 = F6 − 23+1 = −5, x7 = 3−1 = 2, y7 = 4  =4-1=3 8 F7 0 +  y F8 = F7 + 2 4 +1 = 4, x8 = 2, y8 = 4 +1 = 5  =3-1=2 9 F8 0 -  x F9 = F8 − 2 2 +1 =1, x9 = 2 −1 =1, y9 = 5  =2-1=1 10 F9 0 -  x F10 = F9 − 21+1 = 0, x10 =1−1 = 0, y10 = 5  =1-1=0 图 2-18 逐点比较法圆弧插补轨迹