Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 390)

Using QuickPath Plus
Chapter 15
15-10
Circular to Circular blocks
When the coordinates of the point of intersection of a circular path into a
circular path are unknown, use the following format. G13 or G13.1 must
be programmed. If using this format, the R-word cannot be used to
specify the radius of an arc in either of the circular blocks. These blocks
must be programmed in absolute.
Format:
G13G02K__I__;
G02 Z__X__K__I__;
Important: The I, K integrand vectors are not necessarily the same values
as discussed for normal circular interpolation when you use this QuickPath
Plus format. The integrands of the first circular block specify the distance
from the START point to the center of the circle. The integrands of the
second circular block specify the distance from the END point to the center
of the circle (this is the reverse of normal). At least one of these integrand
words must be programmed in each of the two circular blocks.
Neither circular block can contain an angle word (,A) when you use this
format.
Example 15.6
Arc Into Arc Without Programming Intersection
G0X0.Z0.;
G13.G03I5F.1;
G02X12Z5I-2.75K2;
Figure 15.7
Results Arc Into Arc Without Intersection, Example 15.6
Control generates
intersection
Z
X
2 4 6 8 10
2
4
6
8
10
12
+
END OF CHAPTER