HEIDENHAIN iTNC 530 (340 49x-04) - Manual (Page 458)

458 8 Programming: Cycles
8.8 SL c
y
cles
 Feed rate factor in % Q401: Percentage factor by
which the TNC reduces the machining feed rate(Q12)
as soon as the tool moves within the material over its
entire circumference during roughing. If you use the
feed rate reduction, then you can define the feed rate
for roughing so large that there are optimum cutting
conditions with the path overlap (Q2) specified in
Cycle 20. The TNC then reduces the feed rate as per
your definition at transitions and narrow places, so
the machining time should be reduced in total.
 Specify how the TNC should behave during fine
roughing:
„ Q404 = 0
Move the tool along the contour at the current
depth between areas that need to be fine-roughed.
„ Q404 = 1
Between areas that need to be fine-roughed,
retract the tool to safety clearance and move to the
starting point of the next area to be rough-milled.
Feed rate reduction through parameter Q401 is an FCL 3
function and is not automatically available after a software
update (see “Feature content level (upgrade functions)”
on page 8).