下面是一个铣螺纹的程序供你参考
; R2= REFERENCE PLANE
; R4= THREAD DIAMETER
; R5= THREAD DEPTH
; R7= CORE HOLE DIAMETER
; R9= THREAD PITCH
; R10= RETRACT IN RAPID
; R14= FEED STARTUP AND THREAD
; R15= FEED SHUTDOWN THREAD
;=================================================================

N1000 R21=R7/2
N1010 R22=R4/2
N1020 R24=R21+R22
N1030 R25=R24/2
N1070 G0 G90 Z=R2
N1080 G0 Z=R5-R9/2
N1100 G1 G91 G41 X0 Y=R21 F=R14
N1110 G3 X0 Y=-R24 I0 J=-R25 Z=R9/2
N1120 G3 X0 Y0 I0 J=R22 Z=R9
N1130 G3 X0 Y=R24 I0 J=R25 Z=R9/2 F=R15
N1140 G0 G40 Y=-R21
N1170 G90 Z=R10