Comparison Of The Three Variants - Siemens SINUMERIK 828D Manual

7.6
Difference between 3, 3+2 and 5 axes
7.6

Comparison of the three variants

The figure below shows a comparison of the three milling variants. From left to right, 3-axis, 3+1-
axis, and 3+2-axis.
Shaft milling variants
3-axis 3+1-axis 3+2-axis
3-axis
The milling paths are very uniform. Pressure points / matt points are only visible on narrow
curves due to the pressing cut of the ball mill. These are caused by the milling cutter not being
able to cut freely and the material being pressed out.
3+1-axis
The milling paths are very uniform. Hardly any pressure points / matt points are now visible on
narrow curves due to the pressing cut of the ball mill. Due to the positioning, the blade of the ball
mill can now cut freely. However, distortions of the milling paths are visible due to the positioning.
The cutting point drifts due to the positioning on the ball mill. The milling paths no longer run
parallel to the body edges.
3+2-axis
The milling paths are very uniform. No pressure points / matt points are now visible on narrow
curves due to the pressing cut of the ball mill. Due to the positioning, the blade of the ball mill can
now cut freely. However, even greater distortion of the milling paths is visible due to the
positioning.
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