Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 385)

Axis Motion
Chapter 14
14-9
Example 14.6
Arc End Points Same As Start Points
Arc 1 - Full Circle Arc 2 - No Motion
G00X5.Y15; G00X5.Y15;
G02X5.Y15.I5.J-5.F100; G02X5.Y15.R7.07.F100;
M30; M30;
Figure 14.6
Arc with End Point Equal To Start Point
Full circle
Arc 1
0 degree center angle arc
(no axis motion)
Arc 2
5 10 5 10
15
10
15
10
Y
X X
Y
end
start
Center defined
by I and J
start
end
Control cannot determine
centerpoint because R was
used.
If programming a radius command, R, in the same block as I, J, and/or K,
the control gives the R priority. The I, J, and/or K words are then ignored.
When programming I, J, and/or K words for the arc center, the words that
have a zero value can be omitted.
Important: The system installer can specify the maximum allowed
difference between the starting radius of the arc and the ending radius of
the arc. If the difference exceeds the allowed value set in AMP, an error
message occurs.