
B–63522EN/02
16. COORDINATE SYSTEM
CONVERSION
NC FUNCTION
235
Coordinate conversion about an axis can be carried out if the center of
rotation, direction of the axis of rotation, and angular displacement are
specified. This function is very useful in three–dimensional machining
by a die–sinking machine or similar machine. For example, if a program
specifying machining on the XY plane is converted by the three–
dimensional coordinate conversion function, the identical machining can
be executed on a desired plane in three–dimensional space.
X
Y
Z
Three–dimensional coordinate conversion
Z
X
Y
G68 Xpx
1
Ypy
1
Zpz
1
Ii
1
Jj
1
Kk
1
Rα ;
Starting
G69 ;
Canceling three–dimensional
coordinate
Three–dimensional coordinate
conversion mode
Xp, Yp, Zp : Center of rotation (absolute coordinates ) on the X, Y,
and Z axis or parallel axes
I, J, K : Direction of the axis of rotation
R : Angular displacement
Three–dimensional coordinate conversion can be applied up to two times.
N1 G68 Xpx
1
Ypy
1
Zpz
1
Ii
1
Jj
1
Kk
1
Rα ;
N2 G68 Xpx
2
Ypy
2
Zpz
2
Ii
2
Jj
2
Kk
2
Rβ ;
16.3
THREE–
DIMENSIONAL
COORDINATE
CONVERSION
(G68, G69) (M series)
M series
Format