Siemens SINUMERIK 840D Manual page 15

Basic information
SINUMERIK controls offer various functions so that remachining can be avoided:
1
2
1
4
© Siemens AG All rights reserved. SINUMERIK, Manual, 5-axis machining
Compressor function (COMPCAD)
At the block transitions, the linear interpolation
leads to step changes in velocity in the
2
machine axes, which in turn can cause reso-
nance in the machine elements and can ulti-
mately be detected as a beveled pattern
as the effects of vibrations
piece surface.
In accordance with the specified tolerance
3
band, the compressor takes a sequence of
1
G1 commands,
presses them into a spline
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, meaning that the
machine can run at higher speeds, thereby
increasing productivity.
Programmable smoothing
Discontinuous block transitions can be
smoothed with the smoothing function to cre-
ate steady characteristics. This involves
inserting geometrical elements
ners (block transitions).
The tolerance of these geometrical elements
can be adjusted.
1.4
or
1
on the work-
2
2
combines them and com-
, which can be
3
4 at the cor-
15