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Chapter 3 G Commands
59
Ⅰ
Programming
Fig. 3-8
Notes:
z
When I = 0 or K = 0, they can be omitted; one of I, K or R must be input, otherwise the system
alarms.
z
R is valid and I, K are invalid when they are input at the same time.
z
R value must be equal to or more than half distance from starting point to end point, and the
system alarms if the end point is not on the arc defined by R command;
z
Omit all or one of X(U), Z(W); coordinates of starting point and end point of this axis are the same
when omitting ones, the path is a full circle(360°) in G02/G03 when center point are specified
by I,K; the path is 0(0°) when center point is specified by R.
z
R should be used for programming. The system executes in R=
2
2
K
I
+
to ensure starting
point and end point of arc path are the specified ones in I, K programming.
z
When the distance from center point to end point is not equal to R(R
＝
2
2
K
I
+
) in I,K
programming, the system automatically adjusts position of center point to ensure starting point
and end point of arc path are the specified ones; When the distance from center point to end
point is more than 2R, and the system alarms.
z
Arc is less than 360° when R is commanded, the arc is more than 180° when R is negative, and it
is less than or equal to 180° when R is positive.
Example: Arc cutting path from
Φ
45.25 to
Φ
63.06 shown in Fig. 3-9.
