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8.3.2 Description of Turntables
In the case of turntables, each articulation is described by a rotary axis and a
translation vector. The first translation vector positions the centre of the first table
(table resting on the machine bed) in absolute coordinates and the following table(s)
incrementally for table zero positions.
The rotation axis is declared by PA, PB or PC followed by the three associated
translations separated by the character «/».
If an articulation rests on an inclined plane, the plane is declared next by PI, PJ or PK
depending on whether it is parallel to X, Y or Z, followed by the cosine and the sine
of the angle of inclination of the plane.
Example
Representation of turntable movements
X
Y
C
C
15°
Z
B
X
Yc
Xb
Yb
Zb
Xc
Y
Z
B
15°
Programming
[ca]=cos 15° [sa]=sin 15°
G26+ PCxc/yc/0 PBxb/yb/zb PI[ca]/[sa]
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