Siemens SINUMERIK 840D sl Function Manual page 86

F2: Multi-axis transformations
2.9 Orientation
Definition
The basic orientation can be defined in three different ways:
● Definition by calling the transformation
● Definition by the orientation of the active tool
● Definition using a machine data
Definition by calling the transformation
When the transformation is called, the direction vector of the basic orientation can be specified
in the call, e.g. TRAORI(0, 0., 1., 5.). The direction vector is defined by parameters 2
to 4. This is the reason that in the example it has the value (0., 1., 5.).
The first parameter specifies the transformation number. The number can be omitted if the first
transformation is to be activated. To enable the parameters to be identified correctly when
specifying an orientation, a blank space has to be inserted instead of the transformation
number, e.g. TRAORI(, 0., 1., 5.).
Note
The orientation data is absolute. It is not modified by a frame that is possibly active.
The absolute value of the vector is insignificant, only the direction is relevant. Non-programmed
vector elements can be set to zero.
Please note that if all three vector components are zero (because they have been set explicitly
so or not specified at all), the basic orientation is not defined by data in the TRAORI(...) call,
but by one of the two other options.
If a basic orientation is defined by calling the transformation, it cannot be altered while a
transformation is active. The orientation can be changed only by selecting the transformation
again.
Definition by the orientation of the active tool
The basic orientation is determined by the tool, if:
● it has not been defined by specifying a direction vector in the transformation call
and
● a tool is already active.
The orientation of a tool is dependent on the selected plane. It is parallel to Z at G17, parallel
to Y at G18 and parallel to X at G19.
It can be modified arbitrarily by orientable toolholders, see:
Reference:
Function Manual, Basic Functions; Tool Offset (W1), Chapter: "Orientable tool carrier"
If the tool is changed when a transformation is active, the basic orientation is also updated.
The same applies if the orientation of a tool changes as the result of a change in plane (plane
changes are equivalent to tool changes, as they also alter the assignment between tool length
components and individual axes).
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Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions