Siemens sinumerik 840D sl Function Manual page 36

Detailed description
2.2 3-axis and 4-axis transformations
Variants of 3-axis and 4-axis transformations
2
Note: on types 24 and 40 *
*
In the case of transformation types 24 and 40, the axis of rotation and tool orientation can be
set so that the change in orientation takes place at the outside of a taper and not in a plane.
Zero position
Tool orientation at zero position is the position of the tool with G17 as the active working
plane and position of the rotary axis at 0 degrees.
Axis assignments
The three translatory axes included in the transformation are assigned to any channel axes
via machine data $MC_TRAFO_GEOAX_ASSIGN_TAB_n[0..2] and
$MC_TRAFO_AXES_IN_n[0..2]. The following must apply for the assignment of channel
axes to geometry axes for the transformation:
$MC_TRAFO_GEOAX_ASSIGN_TAB_n[0] = $MC_TRAFO_AXES_IN_n[0]
$MC_TRAFO_GEOAX_ASSIGN_TAB_n[1] = $MC_TRAFO_AXES_IN_n[1]
$MC_TRAFO_GEOAX_ASSIGN_TAB_n[2] = $MC_TRAFO_AXES_IN_n[2]
The axes with corresponding index must be assigned to each other.
Parameter assignment procedure
• Enter the type of transformation according to the previous table as machine data:
• Assign channel axes to the geometry axes of the transformation.
• For a 3-axis transformation, set the values for the axis, which is not required:
• For a 4-axis transformation, set the following for the 3 linear axes
Complete examples of a 3-axis and 4-axis transformation can be found in Chapter "Example
for 3- and 4-axis Transformation".
30
workpiece
$MC_TRAFO_TYPE_n
– $MC_TRAFO_GEOAX_ASSIGN_TAB_n[geoax] = 0
– $MC_TRAFO_AXES_IN_n[geoax] = 0
$MC_TRAFO_AXES_IN_n[4] = 0; → there is no 2nd rotary axis
– $MC_TRAFO_GEOAX_ASSIGN_TAB_n[geoax] = ...
– $MC_TRAFO_AXES_IN_n[geoax] = ...
$MC_TRAFO_AXES_IN_n[4] = 0; → there is no 2nd rotary axis
X Y - Z
Y X - Z
any any *
Special functions: 3-Axis to 5-Axis Transformation (F2)
32, 33
34, 35
40
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
Z
any