HEIDENHAIN iTNC 530 (340 422) - Manual (Page 303)

HEIDENHAIN iTNC 530 303
8.3 Cy
cles f
o
r Dr
illing, T
a
pping and Thr
ead Milling
The TNC references the programmed feed rate during
thread milling to the tool cutting edge. Since the TNC,
however, always displays the feed rate relative to the path
of the tool tip, the displayed value does not match the
programmed value.
The machining direction of the thread changes if you
execute a thread milling cycle in connection with Cycle 8
MIRRORING in only one axis.