TMPG_US-EN

Programming Tapered Threads

Even though the thread mill is tapered, the thread mill must move out in X and Y as it moves up in Z. This will allow the tool to follow the taper being created. The helical interpolation shown in Step 5 on the previous page must be broken into segments to make the diameter adjustments. Typically, this adjustment is done in quadrants for simplicity:

5A First quadrant G03 X-0.1819 Y-0.1815 Z0.0139 I0.0000 J-0.1819

Move to 9 o’clock position, move Z-axis 1/4 of the pitch.

Y+ (J+)

X+ (I+)

X- (I-)

Y- (J-)

5B Second quadrant G03 X0.1819 Y-0.1824 Z0.0139 I0.1824 J0.0000

Move to 6 o’clock position, move Z-axis 1/4 of the pitch.

Y+ (J+)

X+ (I+)

X- (I-)

Y- (J-)

18 | THREAD MILLING REFERENCE GUIDE