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8.3 Description of Movements
The machine movements are described differently in twist and turntable modes:
- twist mode: the movements are described from the tool centre outward toward the
machine bed,
- turntable mode: the movements are described from the machine bed toward the
part.
The twist and turntable machine movements described herein are defined using a
configuration example specific to each case. Depending on the case, the RTCP
function is enabled with the specific arguments designating the rotary axes.
Different cases of configuration are processed by a NUM application.
8.3.1 Description of Twist Heads
In the case of twist heads, each articulation is described by a rotary axis and a
translation vector. The translation vector is defined for the zero position of the rotary
axis.
The rotary axis is declared by TA, TB or TC followed the three associated translations
separated by the character «/».
If an articulation rests on an inclined plane, the plane is declared by TI, TJ or TK,
depending on whether it is parallel to X, Y or Z and is followed by the cosine and the
sine of the angle of inclination of the plane.
The tool direction is defined by the components of a unit vector I, J, K pointing in the
plane of rotation of the tool. This value is used to include the tool dimension and wear
offsets that may be introduced during machining in the movements.
Vector I, J, K is the first argument following the RTCP function (G26+).
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