Siemens SINUMERIK 840D sl Programming Manual page 318

Transformations
6.2 Three, four and five axis transformation (TRAORI)
Programming of directional vector
The components of the direction vector are programmed with
towards the tool adapter; the length of the vector is of no significance.
Vector components that have not been programmed are set equal to zero.
Programming the tool orientation with LEAD= and TILT=
The resultant tool orientation is determined from:
● Path tangent
● Surface normal vector
● Lead angle
● Tilt angle
Behavior at inside corners (for 3D tool offset)
If the block is shortened at an inside corner, the resulting tool orientation is also achieved at
the end of the block.
318
at the start of the block
LEAD
in the plane defined by the path tangent and surface normal vector
at the end of the block
TILT
vertical to the path tangent and relative to the surface normal vector
and at the end of the block
A4, B4, C4
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
. The vector points
A3, B3, C3
A5, B6, C5
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