Linear Axes, Rotary Axes And Kinematics - Siemens SINUMERIK 840D Manual

1.3
Linear and rotary axes
Tool tip motion
Setting the tool
at an angle
10
Basic information
1.3

Linear axes, rotary axes and kinematics

1.3.1 Axes and programming
© Siemens AG All rights reserved. SINUMERIK, Manual, 5-axis machining
To accommodate machining scenarios involv-
ing tools set at an angle or in order to mill
geometries located anywhere in space, the
three linear axes X, Y and Z are required
along with two of the rotary axes A, B or C. It
must be possible to control the axes simulta-
neously.
The tool position is approached in space using
linear axes X, Y and Z. This enables the tool
tip to adopt any position.
With 3-axis machining, you program the three
linear axes to achieve the desired machining
operations. The contour is milled line by line
by moving the three linear axes.
If the tool also has to be set at an angle, you
will need rotary axes as well.
The inclination of the tool (i.e. the tool orienta-
tion) is changed using two axes of rotation,
e.g. B and C.
This is necessary, for example, if the tool
needs to be angled in relation to the machin-
ing surface or if you want to mill a pocket with
inclined walls within the context of circumfer-
ential milling.
Using three linear axes and two rotary axes,
theoretically any point in space can be
approached with any tool orientation. This is
the basis of 5-axis machining.