
B-63782EN/01 NC FUNCTIONS 3.INTERPOLATION FUNCTION
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3.13 SPLINE INTERPOLATION (G06.1)
Spline interpolation produces a spline curve connecting specified
points. When this function is used, the tool moves along the smooth
curve connecting the points. The spline interpolation command
eliminates the need to approximate the smooth curve with minute
straight lines or arcs. A machining program coded with this command
requires less tape than that including the approximation.
Format
- Sample program
The system is in the spline interpolation mode from N120 to N500 of
the program below:
N110 G00 X_Y_Z_ ; P
1
N120 G06.1 ;
N130 X_Y_Z_ ; P
2
N140 X_Y_Z_ ; P
3
N150 X_Y_Z_ ; P
4
:
N500 X_Y_Z_ ; P
n
N510 G00 X_Y_Z_ ; P
n+1
Fig.3.13 Spline interpolation
P
1
P
2
P
3
P
4
P
5
P
n
P
n+1
The following command sets spline interpolation
mode:
G06.1 ;
In the G06.1 block, a tangent vector at the start
point can be specified.
G06.1 X_ Y_ Z_ ;
X_ : X-axis component of the tangent vector
Y_ : Y-axis component of the tangent vector
Z_ : Z-axis component of the tangent vector