Cycle Parameters - HEIDENHAIN TNC 620 User Manual

4
Fixed Cycles: Tapping / Thread Milling
4.8 THREAD DRILLING/MILLING (Cycle 264, DIN/ISO: G264)

Cycle parameters

Nominal diameter Q335: Nominal thread diameter.
Input range 0 to 99999.9999
Thread pitch Q239: Pitch of the thread. The
algebraic sign differentiates between right-hand and
left-hand threads:
+
–= left-hand thread
Input range -99.9999 to 99.9999
Thread depth Q201 (incremental): Distance
between workpiece surface and root of thread.
Input range -99999.9999 to 99999.9999
Total hole depth Q356 (incremental): Distance
between workpiece surface and bottom of hole.
Input range -99999.9999 to 99999.9999
Feed rate for pre-positioning Q253: Traversing
speed of the tool when moving in and out of the
workpiece, in mm/min. Input range 0 to 99999.9999
alternatively FMAX, FAUTO
Climb or up-cut Q351: Type of milling operation
with M3
+1
–1
machining)
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:
122
= right-hand thread
= Climb
= Up-cut (If you enter 0, climb milling is used for
the plunging depth is equal to the depth
the plunging depth is greater than the depth
HEIDENHAIN | TNC 620 | User's manual for cycle programming | 9/2015