Siemens sinumerik 840D sl Function Manual page 50

Detailed description
2.6 Generic 5-axis transformation and variants
2.6.2 Description of machine kinematics
Machine types
Like the existing 5-axis transformations, there are three different variants of generic 5-axis
transformation:
1. Machine type: Rotatable tool
2. Machine type: Rotatable workpiece
3. Machine type: Rotatable tool and rotatable workpiece - one rotary axis changes the tool
Configurations
Machine configuration is defined as usual (see Chapter "Configuration of a 5-axis
Transfromation") in the following machine data:
$MC_TRAFO_TYPE_1, ..., _8
Additional types have been introduced for generic 5-axis transformation:
Table 2-2
Machine type
Swivel/rotatable:
Transformation types
Rotary axis direction
The direction of the rotary axis is defined by the following machine data:
$MC_TRAFO5_AXIS1_n (1st rotary axis) and
$MC_TRAFO5_AXIS2_n (2nd rotary axis)
where ne is 1 or 2 for the first or second 5-axis transformation in the system respectively.
The machine data specified above are fields with three values, which describe that axis
direction vectorially (similar to the description of rotary axes for orientable toolholder). The
absolute value of the vectors is insignificant; only the defined direction is relevant.
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Both rotary axes change the orientation of the tool. The orientation of the workpiece is
fixed.
Both rotary axes change the orientation of the workpiece. The orientation of the tool is
fixed.
orientation and the other the workpiece orientation.
Overview of machine types for the generic 5-axis transformation
1
Tool
24
2 3
Workpiece Tool/workpiece
40 56
Special functions: 3-Axis to 5-Axis Transformation (F2)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0