January 2012 6.20 Commissioning 1133
Selection criteria
for setting the
mode of operation
The settings for the nominal position value filters and look-ahead parameters
mainly depend on the emphasis of the requirements for machining the
workpiece. Speed and accuracy, in connection with clean and smooth
surfaces, are the decisive criteria.
At the same time, the oscillation and resonance tendencies of the machining
system (the machine tool) are to be considered, and taken into account in the
settings for the nominal position value filters.
Criterion: Clean surface
Definition of the term "surface":
A clean and smooth surface has the highest priority – The given nominal
value is additionally smoothed by reducing the path jerk and the limit
frequency.
Application: Finishing
Oscillations in the axes must be damped, since following errors of 1 µm are
still visible on the surface
Tolerance (Cycle 32) typically between 0.01 and 0.02 mm (may also be
exceeded in order to achieve a better surface)
Criterion: Speed (tolerances above 50 µm)
Definition of the term "speed":
Surface quality is secondary; short machining times have the highest priority
Application: Roughing
Tolerances (Cycle 32) typically between 0.1 and 0.2 mm
Criterion: High accuracy
Definition of the term "accuracy":
Maintaining the tolerances has the highest priority
Application: Very fine and small parts
Slight oscillations can be seen on the surface
Tolerances typically between 0.005 and 0.01 mm
Compensation of reversal peaks must be performed beforehand
Speed
Clean and
smooth surface
Accuracy
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