HEIDENHAIN iTNC 530 (340 420) - Manual (Page 281)

HEIDENHAIN iTNC 530 253
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 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 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
U U U U Countersink Q360: Execution of the chamfer
0 = before thread machining
1 = after thread machining
U U U U Set-up clearance Q200 (incremental value): Distance
between tool tip and workpiece surface.