Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual page 114

• For G03 (CCW), when both R-specified and center specified (I, J, K) are specified in the same block at the same time, the
R-specified arc command takes priority.
• If a perfect circle command (start point and end point the same) is specified in R-specified circular interpolation, the R-
specified arc command ends immediately, and there is no operation.
• There are three methods for deceleration check. They are command deceleration check method, smoothing check method,
and in-position check method. Set the deceleration check method to be used in fast forward/cutting in [Motion Control
Parameter][G-code Control Parameter][G-code Control System Parameter]"Control Setting""Deceleration Check".
Refer to deceleration check for deceleration check. (Page 178 Deceleration check)
Program example
■Program that draws an arc less than 180 when the arc radius value is positive
Program
G91 G03 X-50. Y50. R50. F500.
End point(X-50,Y50)
Feed speed
500[mm/min]
-50
■Program that draws an arc more than 180 when the arc radius value is negative
Program
G91 G03 X-50. Y50. R-50. F500
End point(X50,Y50)
-50
5 G-CODE CONTROL PROGRAMS
112
5.6 G-Code
Y
50
X
Start point
Y
Feed speed
50
500[mm/min]
X
Start point
Remarks

[Unit: mm]
Remarks

[Unit: mm]