Heidenhain TNC 620 (34056x-04) Cycle programming Manual de usuario Pagina 124

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Fixed Cycles: Tapping / Thread Milling
4.10 OUTSIDE THREAD MILLING (Cycle 267, DIN/ISO: G267, software
option 19)
4
124
TNC 620 | User's Manual Cycle Programming | 5/2013
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
Threads per step Q355: Number of thread starts by
which the tool is displaced:
0 = one helix on the thread depth
1 = continuous helix on the complete thread length
>1 = several helix paths with approach and
departure, between these the TNC sets the tool by
Q355 x pitch. Input range 0 to 99999
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
Set-up clearance Q200 (incremental): Distance
between tool tip and workpiece surface. Input range
0 to 99999.9999
Depth at front Q358 (incremental): Distance
between tool tip and the top surface of the
workpiece for countersinking at front. Input range
-99999.9999 to 99999.9999
Countersinking offset at front Q359 (incremental):
Distance by which the TNC moves the tool center
away from the hole center. Input range 0 to
99999.9999
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