Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 429)

Using QuickPath Plus
Chapter 15
15-11
Circular to Circular Blocks
When the coordinates of the point of intersection of a circular path into a
circular path are not known, use the following format. Note that G13 or
G13.1 must be programmed. If using this format the R word may not be
used to specify the radius of an arc in either of the circular blocks. These
blocks must be programmed in absolute.
Format:
G13 G02 I__ J__ ;
G02 X__ Y__ I__ J__ ;
Important: The I, J, K integrand vectors are not necessarily the same
values as discussed in section 15.1.3. 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 may contain an angle word (,A) when using this
format.