HEIDENHAIN iTNC 530 (340 422) ISO programming - Manual (Page 400)

400 8 Programming: Cycles
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U U U U Tolerance for contour deviation: Permissible
contour deviation in mm (for inch programs in inches)
U U U U Finishing=0, Roughing=1: Activate filter:
n Input value 0:
Milling with increased contour accuracy. The
TNC uses the filter settings that your machine tool
builder has defined for finishing operations.
n
Input value 1:
Milling at an increased feed rate. The TNC uses
the filter settings that your machine tool builder has
defined for roughing operations.
U U U U Tolerance for rotary axes: Permissible position
error of rotary axes in degrees when M128 is active.
The TNC always reduces the feed rate in such a way
that—if more than one axis is traversed—the slowest
axis moves at its maximum feed rate. Rotary axes are
usually much slower than linear axes. You can
significantly reduce the machining time for programs
for more than one axis by entering a large tolerance
value (e.g. 10°), since the TNC does not always have
to move the rotary axis to the given nominal position.
The contour will not be damaged by entering a
tolerance value. Only the position of the rotary axis
with respect to the workpiece surface will change.