HEIDENHAIN TNC 410 ISO Programming - Manual (Page 222)

196 8 Programming: Cycles
8.3 Cy
cles f
o
r Dr
illing
, T
a
p
p
ing
and
Th
read Millin
g U U U U Set-up clearance Q200 (incremental value): Distance
between tool tip and workpiece surface.
U U U U Depth Q201 (incremental value): Distance between
workpiece surface and bottom of hole (tip of drill
taper).
U U U U Feed rate for plunging Q206: Traversing speed of
the tool during drilling in mm/min.
U U U U 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:
n the plunging depth is equal to the depth
n the plunging depth is greater than the depth
U U U U Workpiece surface coordinate Q203 (absolute
value): Coordinate of the workpiece surface.
U U U U 2nd set-up clearance Q204 (incremental value):
Coordinate in the tool axis at which no collision
between tool and workpiece (clamping devices) can
occur.
U U U U Decrement Q212 (incremental value): Value by which
the TNC decreases the plunging depth Q202.
U U U U Minimum plunging depth Q205 (incremental value): If
you have entered a decrement, the TNC limits the
plunging depth to the value entered with Q205.
U U U U 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
U U U U 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.
U U U U Infeed depth for chip breaking Q257 (incremental
value): Depth at which the TNC carries out chip
breaking. There is no chip breaking if 0 is entered.
U U U U Retraction rate for chip breaking Q256
(incremental value): Value by which the TNC retracts
the tool during chip breaking.
U U U U Dwell time at depth Q211: Time in seconds that the
tool remains at the hole bottom.
Example: NC block
N12 G205 Q200=2 Q201=-80 Q206=150
Q202=15 Q203=+100 Q204=50 Q212=0.5
Q205=3 Q258=0.5 Q259=1 Q257=5
Q256=0.2 Q211=0.25 *
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.