HEIDENHAIN iTNC 530 (340 420) ISO programming - Manual (Page 257)

HEIDENHAIN iTNC 530 257
8.3 Cy
cles f
o
r Dr
illing, T
a
pping and Thr
ead Milling
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 Total hole depth Q356 (incremental value): Distance
between workpiece surface and bottom of hole.
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 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 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.
U U U U Infeed depth for chip breaking Q257 (incremental
value): Depth at which 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 Depth at front Q358 (incremental value): Distance
between tool tip 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.