6. Interpolation Functions
6.4 Circular Interpolation
47
Plane selection
The planes in which the arc exists are the following three planes (refer to the detailed drawings),
and are selected with the following method.
XY plane
G17; Command with a (plane selection G code)
ZX plane
G18; Command with a (plane selection G code)
YZ plane
G19; Command with a (plane selection G code)
Change into linear interpolation command
Program error (P33) will occur when the center and radius are not designated at circular command.
When the parameter "#11029 Arc to G1 no Cent (Change command from arc to linear when no arc
center designation)" is set, the linear interpolation can be applied to terminal coordinates value for
only the block. However, a modal is the circular modal.
This function is not applied to a circular command by a geometric function.
(Example) The parameter "#11029 Arc to G1 no Cent (Change command from arc to linear when
no arc center designation)" = "1"
N1
N3
20
0
G90 X0 Y0 ;
N1 G02 X20. I10. F500 ;
N2 G00 X0
;
N3 G02 X20. F500 ;
M02 ;
… (a)
… (b)
(a) The circular interpolation (G02) is executed because there is a center command.
(b) The linear interpolation (G01) is executed because there is no center and radius command.