一日一例——梯形螺纹（西门子802D）

程序参考：

AA420.MPF; (外螺纹加工程序)

G90 G95 G40 G71;

T3D1; (换外螺纹车刀)

M03 S600 F0.1 M08;

G00 X42 Z3;

CYCLE97(2, ,0,-20,40,40,3,2,1.3,0.05,30, 0,6,1,3);

G74 X0 Z0;

M30;

BB420.MPF; (内梯形螺纹加工程序)

G90 G95 G40 G71;

T4D1; (换内梯形螺纹车刀)

M03 S400 F0.1 M08;

G00 X25.0 Z6.0;

CYCLE97(3, ,0,-45,21,21,6,3,1.75,0.05,15, 0,20,1,4);

G74 X0 Z0;

M30;