HEIDENHAIN TNC 410 ISO Programming - Manual (Page 240)

214 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 Nominal diameter Q335: Nominal thread diameter.
U U U U Thread pitch Q239: Pitch of the thread. The algebraic
sign differentiates between right-hand and left-hand
threads:
+ = right-hand thread
– = left-hand thread
U U U U Thread depth Q201 (incremental value): Distance
between workpiece surface and root of thread.
U U U U Countersinking depth Q356 (incremental value):
Distance between tool point and the top surface of
the workpiece.
U U U U Feed rate for pre-positioning Q253: Traversing
speed of the tool when moving in and out of the
workpiece, in mm/min.
U U U U Climb or up-cut Q351: Type of milling operation with
M03
+1 = climb milling
–1 = up-cut milling
U U U U Set-up clearance Q200 (incremental value): Distance
between tool tip and workpiece surface.
U U U U Set-up clearance to the side Q357 (incremental
value): Distance between tool tooth and the wall.
U U U U Depth at front Q358 (incremental value): Distance
between tool point and the top surface of the
workpiece for countersinking at the front of the tool.
U U U U Countersinking offset at front Q359 (incremental
value): Distance by which the TNC moves the tool
center away from the hole center.