Transformations; General Programming Of Transformation Types - Siemens SINUMERIK 840D sl Programming Manual

Work preparation

3.9 Transformations

3.9 Transformations
3.9.1

General programming of transformation types

General function
You can choose to program transformation types with suitable parameters in order to adapt the
controller to various machine kinematics. These parameters can be used to declare both the
orientation of the tool in space and the orientation movements of the rotary axes accordingly for
the selected transformation.
In three-, four-, and five-axis transformations, the programmed positional data always relates
to the tip of the tool, which is tracked orthogonally to the machined surface in space. The
Cartesian coordinates are converted from the basic coordinate system to the machine
coordinate system and relate to the geometry axes. These describe the operating point. Virtual
rotary axes describe the orientations of the tool in space and are programmed with TRAORI.
In the case of kinematic transformation, positions can be programmed in the Cartesian
coordinate system. The controller maps the Cartesian coordinate system traversing
movements programmed with TRANSMIT, TRACYL and TRAANG to the traversing
movements of the real machine axes.
Programming
Three, four and five axis transformations (TRAORI)
The orientation transformation declared is activated with the TRAORI command and the three
possible parameters for transformation number, orientation vector and rotary axis offsets.
TRAORI(transformation number, orientation vector, rotary axis
offsets)
Kinematic transformations
TRANSMIT(transformation number) declared transformations are examples of
kinematic transformation.
TRACYL(working diameter, transformation number)
TRAANG(angle of offset axis, transformation number)
Deactivate active transformation
TRAFOOF can be used to deactivate the currently active transformation.
Orientation transformation
Three, four and five axis transformations (TRAORI)
For the optimum machining of surfaces configured in space in the working area of the machine,
machine tools require other axes in addition to the three linear axes X, Y and Z. The additional
654
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
NC programming