Rockwell Automation 8520 9/Series CNC Lathe User Manual
Page 364
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Axis Motion
Chapter 14
14-6
Example 14.4
Circular Interpolation G18 (ZX Plane)
Absolute Mode
Incremental Mode
G08G02;
X50.Z45.I15.K0F.1;
G08G02;
X30.Z-15.I15.K0F.1;
or
or
G08G02;
X50.Z45.R15.F.1;
G08G02;
X30.Z-15.R15.F.1;
In Example 14.4, the K-word can be omitted. If either I or K is omitted
from the circular block, the control assumes they have a value of 0, unless
an R-word is present.
Figure 14.4
Results of Circular Interpolation, Example 14.4
X
Z
50
15
R15
60
20
When you program an arc using the radius (R) value, two arcs are possible
(Figure 14.5). Program the R-word with a positive or negative value to
distinguish between these arcs.
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