Siemens SINUMERIK 840D sl Function Manual page 42

F2: Multi-axis transformations
2.2 5-axis transformation
Machine type
The machine types have been designated above as types 1 to 3 and are stored in the following
machine data as a two-digit number:
MD24100 $MC_TRAFO_TYPE_1 (definition of channel transformation 1)
...
MD24480 $MC_TRAFO_TYPE_10 (definition of channel transformation 10)
The following table contains a list of machine types, which are suitable for 5-axis transformation.
axis se‐
quence
AB
AC
BA
BC
CA
CB
Combinations that are not meaningful, whose C-axis corresponds to a rotation of the tool about its
longitudinal axis (symmetry axis), are marked by x.
Identification of axis sequence
The axis sequence is identified in the following way:
● AB means: A is 4th axis, B is 5th axis of transformation
● For machine type 3, the swivel axis of the tool is the 4th axis of the transformation and the
rotary axis of the workpiece is the 5th axis of the transformation.
Axis assignment
The axis assignment at the start of the 5-axis transformation defines the axis that will be
mapped by the transformation internally onto a channel axis. Thus, the following is defined in
the machine data below:
MD24110 $MC_TRAFO_AXES_IN_1 (Axis assignment for transformation 1)
...
MD24482 $MC_TRAFO_AXES_IN_10 (Axis assignment for transformation 10)
Geometry information
Information concerning machine geometry is required so that the 5-axis transformation can
calculate axis values: This information is stored in the machine data (in this case, for the first
transformation in the channel):
42
Machine type 1
with swivelling / rotary tool
16
x
18
x
20
21
Machine type 2
with swivelling / rotary work‐
piece
32
33
34
35
x
x
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Machine type 3
with swivelling / rotary tool/
workpiece
48
49
50
51
x
x
Special functions