Cycle Parameters - HEIDENHAIN TNC 620 User Manual

THREAD DRILLING/MILLING (Cycle 264, DIN/ISO: G264, software

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:
+
= right-hand thread
–= 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
= climb
–1
= up-cut
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
TNC 620 | User's Manual Cycle Programming | 3/2014
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