HEIDENHAIN ITNC 530 - CYCLE PROGRAMMING User Manual page 126

Cycle parameters
U Nominal diameter Q335: Nominal thread diameter.
Input range 0 to 99999.9999
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
Input range -99.9999 to 99.9999
U Thread depth Q201 (incremental): Distance
between workpiece surface and root of thread.
Input range -99999.9999 to 99999.9999
U Total hole depth Q356 (incremental): Distance
between workpiece surface and bottom of hole. Input
range -99999.9999 to 99999.9999
U Feed rate for pre-positioning Q253: Traversing
speed of the tool in mm/min when plunging into the
workpiece, or when retracting from the workpiece.
Input range 0 to 99999,999 alternatively FMAX, FAUTO,
PREDEF.
U Climb or up-cut Q351: Type of milling operation with
M3
+1 = climb milling
–1 = up-cut milling
Alternatively PREDEF
U Plunging depth Q202 (incremental): Infeed per cut.
The depth does not have to be a multiple of the
plunging depth. Input range 0 to 99999.9999. 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
U Upper advanced stop distance Q258 (incremental):
Setup clearance for rapid traverse positioning when
the TNC moves the tool again to the current plunging
depth after retraction from the hole. Input range 0 to
99999.9999
U Infeed depth for chip breaking Q257 (incremental):
Depth at which TNC carries out chip breaking. No chip
breaking if 0 is entered. Input range 0 to 99999.9999,
alternatively PREDEF
U
Retraction rate for chip breaking Q256
(incremental): Value by which the TNC retracts the
tool during chip breaking. Input range 0.1000 to
99999.9999
126 Fixed Cycles: Tapping / Thread Milling