Generic Orientation Transformation Variants - Siemens SINUMERIK 840D sl Function Manual

2. B-axis is the rotary axis (parallel to the y direction):
MD24572 $MC_TRAFO5_AXIS2_1[0] = 0.0 (direction 2nd rotary axis)
MD24572 $MC_TRAFO5_AXIS2_1[1] = 1.0
MD24572 $MC_TRAFO5_AXIS2_1[2] = 0,0
1.7.3

Generic orientation transformation variants

Expansion
Generic orientation transformation for 5-axis transformation has been extended with the
following variants for 3-and 4-axis transformation:
Variant 1
4-axis transformations
A 4-axis transformation is characterized by the exclusive use of the first rotary axis as an
entry axis of the transformation. The following applies:
MD24110 $MC_TRAFO_AXES_IN_1[4] = 0 (axis assignment for transformation 1) or
MD24210 $MC_TRAFO_AXES_IN_2[4] = 0 (axis assignment for transformation 2)
Variant 2
3-axis transformations
In a 3-axis transformation, one of the geometry axes is not present, by entering a zero in the
field:
MD24120 $MC_TRAFO_GEOAX_ASSIGN_TAB_1[n] (assignment between geometry axis
and channel axis for transformation 1)
MD24220 $MC_TRAFO_GEOAX_ASSIGN_TAB_2[n] (assignment between geometry axis
and channel axis for transformation 2)
Transformation types
Both variants of generic 3- or 4-axis transformation are described by the following
transformation types:
• 3- or 4-axis transformation with rotatable tool
$MC_TRAFO_TYPE_n = 24
• 3- or 4-axis transformation with rotatable workpiece
$MC_TRAFO_TYPE_n = 40
In conventional 3-axis or 4-axis transformations, the transformation type also defined the
basic tool orientation in addition to the position of the rotary axis, which could then no longer
be influenced.
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
F2: Multi-axis transformations
1.7 Generic 5-axis transformation and variants
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