Machine Types For 5-Axis Transformation - Siemens SINUMERIK 840D sl Function Manual

F2: Multi-axis transformations
2.2 5-axis transformation
Fields of application
The "5-axis transformation" machining package is provided for machine tools, which have two
additional rotary axes (rotation about the linear axes) in addition to three linear axes X, Y and
Z: This package thus allows an axially symmetrical tool (milling cutter, laser beam) to be
oriented in any desired relation to the workpiece in every point of the machining space.
The workpiece is always programmed in the rectangular workpiece coordinate system; any
programmed or set frames rotate and shift this system in relation to the basic system. The
kinematic transformation then converts this information into motion commands of the real
machine axes.
The kinematic transformation requires information about the design (kinematics) of the
machine, which are stored in machine data.
The kinematic transformation does not act on positioning axes.
2.2.2

Machine types for 5-axis transformation

Kinematics of machines for 5-axis transformation
5-axis machines are generally equipped with three linear and two rotary axes: the latter may
be implemented as a two-axis swivel head, a two-axis rotary table or as a combination of single-
axis rotary table and swivel head. These types of machine are characterized by:
1. Three linear axes form a right-handed, Cartesian coordinate system.
2. Rotary axes are parallel to the traversing direction of one of the linear axes.
Example:
– A parallel to X
– B parallel to Y
– C parallel to Z
3. Rotary axes are positioned vertically one above the other.
4. Rotary axes turn
– Tool with two-axis swivel head (machine type 1)
– Workpiece with two-axis rotary table (machine type 2)
– Tool and workpiece with single-axis rotary table and swivel head (machine type 3)
5. The following applies to machine types 1 and 2:
– Rotary axis 1 is treated as the 4th machine axis of the transformation.
– Motion of 1st rotary axis changes the orientation of the 2nd rotary axis.
– Rotary axis 2 is treated as the 5th machine axis of the transformation.
– Motion of 2nd rotary axis does not change the orientation of the 1st rotary axis.
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Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions