Siemens SINUMERIK 828D Manual page 18

1.5
Programming rotary
axes
Programming direction
vector
18
Basic information
CNC programming options in the 5-axis area
C3
B3
A3
In addition to programming based on the direction vector and rotary axis positions, there are also
other forms of angle programming. These include, for example, Euler or RPY angles. Further
information regarding this topic can be found in Section "Programming the tool orientation" on
page 86.
© Siemens AG All rights reserved SINUMERIK, Manual, Mold-Making with 3- to 5-Axis Simultaneous Milling
For the purpose of 5-axis machining, the
orientation of the tool needs to be defined in
addition to the position setpoint of the
machining point. The position setpoint is
defined in the CNC program by means of the
coordinate axes X, Y, and Z.
The tool orientation can be specified on the
basis of the rotary axis positions. This enables
the position setpoint and tool orientation to be
defined in a unique manner.
The example below shows the tool tip in the
position (0,0,0), and the tool shank is the
diagonal of a cube (35.26° relative to the X-Y
plane).
N100 G1 X0 Y0 Z0 B=54.73561 C=45
When describing the tool orientation, it also
makes sense to specify the direction vectors
A3, B3, and C3 so that the orientation can be
programmed independently of the machine
kinematics.
The programming of the example above would
look like the following after specifying the
rotary axis positions:
N100 G1 X0 Y0 Z0 A3=1 B3=1 C3=1