HEIDENHAIN TNC 426 (280 476) Pilot - Manual (Page 86)

87
Special-Cycles
X
Z
T
TOLERANCE (32)
The machine and the TNC must be specially prepared for fast
contour milling by the machine tool builder!
Cycle 32 TOLERANCE is effective as soon as it is defined in
the part program!
The TNC automatically smooths the contour between any (compensated
or uncompensated) contour elements. The tool therefore moves continu-
ously on the workpiece surface. If necessary, the TNC automatically
reduces the programmed feed rate so that the program can be run at
the fastest possible speed and without "jerk".
A contour deviation results from the smoothing out. The size of this
deviation (TOLERANCE VALUE) is set in a machine parameter by the
machine manufacturer. You can change the pre-set tolerance value
with Cycle 32 (see figure at top right).
CYCL DEF: Select Cycle 32 TOLERANCE
Tolerance T: permissible contour deviation in mm