Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 579)

Compound Turning Routines
Chapter 24
24-15
Figure 24.11
Results of Example 24.3
Cutting feed
Rapid feed
X
Z
Start Point
10
(I+K+U+W)/2
1.4
100
80
60
40
20
20 40 60 80 100 120 140
The G74 rough facing routine is used to rough out the contour of a
workpiece by making repetitive cuts parallel to the X axis. A final pass
may be made with this routine to cut parallel to the final contour of the
workpiece. At the completion of this routine a finish allowance may also
be left on the workpiece to be removed later by a G72 finishing routine.
This routine may be used in conjunction with Tool Tip Radius
Compensation (TTRC). If TTRC is active when the routine is executed the
tool radius is taken into consideration on each consecutive pass.
24.2
Rough Facing Routine (G74)