Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 575)

Compound Turning Routines
Chapter 24
24-11
Example 24.2
Case 1 G73 Roughing Routine
N011 G00X80.Z150.;
N012 G73P14Q18U.8W.8I.6K.6D18.R7.F100;
N013 M30;
N014 X20.;
N015 Z110.;
N016 X40.Z80.;
N017 Z50.;
N018 X70.Z40.;
Figure 24.8
Results of Example 24.2
Cutting feed
Rapid feed
Z
X
Start Point
18 (D)
1.4
0 50 80 110 140 40
20
40
70
In Figure 24.8, the final pass over the workpiece does not remove all
material from the final contour. A finishing pass is still required (typically
a G72) to remove the finish amounts U and W.
G73 Tool Paths, Case 2
If a pocket or multiple pockets are present in a workpiece contour, it
requires a Case 2 G73 contour turning routine.
For Case 2, the control cuts each pocket separately starting with the pocket
closest to the beginning of the operation. Figure 24.9 shows the tool paths
for a typical multiple pocket contour. The retract path used after each
roughing pass is different than for Case 1 roughing.