Siemens SINUMERIK 828D Manual page 21

Basic information
SINUMERIK controls offer various functions so that remachining can be avoided:
1
2
1
4
© Siemens AG All rights reserved SINUMERIK, Manual, Mold-Making with 3- to 5-Axis Simultaneous Milling
Compressor function
(COMPCAD/COMPSURF)
At the block transitions, the interpolation leads
2
to step changes in velocity in the machine
axes, which in turn can cause resonance in
the machine elements and can ultimately be
detected as a beveled pattern
effects of vibrations
face.
In accordance with the specified tolerance
3
band, the compressor
NC commands,
compresses them into a spline
be directly executed by the control.
The compressor generates smooth paths and
paths with constant curvature. The constant
curvature results in a steady velocity and
acceleration characteristic. The surface quality
is improved and the machine can run at higher
velocities, thereby increasing productivity.
Programmable smoothing (G645)
Discontinuous block transitions can be
blended using the smoothing function to
create steady characteristics. This involves
inserting geometrical elements
corners (block transitions).
The tolerance of these geometrical elements
can be adjusted (see also 3.6).
1.6
or as the
1
on the workpiece sur-
2
takes a sequence of
1
2
combines them and
, which can
3
at the
4
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