Programming The Tool Orientation - Siemens SINUMERIK 828D Manual

3.5
Programming rotary
axes
86
Important functions for 3- to 5-axis machining

3.5.3 Programming the tool orientation

For an active 5-axis transformation, the orientation of the tool relative to the workpiece must be
programmed in addition to the position of the tool tip. This can be performed in several ways.
Rotary axis positions (A=<value> B=<value> C=<value>)
The most common way is to program the positions of the swivel axes directly. In this way, the tool
orientations are always specified implicitly, which however are directly dependent on the
machine kinematics.
A commonly used machine type is shown in the graphic. However, there are also other basic
kinematics with the C and A axes as table axes or in a mixed arrangement, and in each of these
machine types different tool orientations are associated with the specified pair of C and A axis
positions. This means that the same problem exists with regard to the tool orientation as for the
linear movements. The solution there was that TRAORI enables the position of the tool tip to be
programmed independently of the machine kinematics. In the same way, kinematic-independent
options have been introduced for the tool orientation programming.
© Siemens AG All rights reserved SINUMERIK, Manual, Mold-Making with 3- to 5-Axis Simultaneous Milling
The tool orientation in space is clearly defined
through the specification of the rotary axis
positions for the C and A axes.
However, this also depends on the kinematics
type.
The NC program would then appear as
follows:
N020 TRAORI
...
N140 G1 A-45 C0