HEIDENHAIN TNC 320 (340 551-01) - Manual (Page 193)

HEIDENHAIN TNC 320 193
8.2 Cy
cles f
o
r Dr
illing,
T
apping and Thr
ead Milling
8 Set-up clearance Q200 (incremental value): Distance
between tool tip and workpiece surface.
8 Depth Q201 (incremental value): Distance between
workpiece surface and bottom of hole (tip of drill
taper).
8 Feed rate for plunging Q206: Traversing speed of
the tool during drilling in mm/min.
8 Plunging depth Q202 (incremental value): Infeed per
cut. The depth does not have to be a multiple of the
plunging depth. The TNC will go to depth in one
movement if:
„ the plunging depth is equal to the depth
„ the plunging depth is greater than the depth
8 Workpiece surface coordinate Q203 (absolute
value): Coordinate of the workpiece surface.
8 2nd set-up clearance Q204 (incremental value):
Coordinate in the tool axis at which no collision
between tool and workpiece (clamping devices) can
occur.
8 Decrement Q212 (incremental value): Value by which
the TNC decreases the plunging depth Q202.
8 Minimum plunging depth Q205 (incremental value): If
you have entered a decrement, the TNC limits the
plunging depth to the value entered with Q205.
8 Upper advanced stop distance Q258 (incremental
value): Set-up clearance for rapid traverse positioning
when the TNC moves the tool again to the current
plunging depth after retraction from the hole; value
for the first plunging depth.
8 Lower advanced stop distance Q259 (incremental
value): Set-up clearance for rapid traverse positioning
when the TNC moves the tool again to the current
plunging depth after retraction from the hole; value
for the last plunging depth.
If you enter Q258 not equal to Q259, the TNC will change
the advance stop distances between the first and last
plunging depths at the same rate.