Thread Milling - Cycle78 - Siemens SINUMERIK 840D sl Programming Manual

Programming cycles externally
18.1 Technology cycles
18.1.9

Thread milling - CYCLE78

Programming
CYCLE78(REAL _RTP, REAL _RFP, REAL _SDIS, REAL _DP, REAL _ADPR, REAL
_FDPR, REAL _LDPR, REAL _DIAM, REAL _PIT, INT _PITA, REAL _DAM, REAL
_MDEP, INT _VARI, INT _CDIR, REAL _GE, REAL _FFD, REAL _FRDP, REAL
_FFR, REAL _FFP2, INT _FFA, STRING[15] _PITM, STRING[20] _PTAB,
STRING[20] _PTABA, INT _GMODE, INT _DMODE, INT _AMODE)
Parameters
No. Param Param
mask internal
RP _RTP
1
Z0 _RFP
2
3 SC _SDIS
4 Z1 _DP
5 _ADPR
6 D _FDPR
7 ZR _LDPR
8 _DIAM
∅
P _PIT
9
10 _PITA
11 DF _DAM
V1 _MDEP
12
_VARI
13
654
Explanation
Retraction plane (abs)
Reference point of tool axis (abs)
Safety clearance (to be added to reference point, enter without sign)
Final drilling depth (abs/inc), see _AMODE
Predrilling depth with reduced drilling feedrate (inc) effective with VARI TEN THOUSAND
Maximum depth infeed (inc)
D ≥ Z1 ⇒ One infeed to the final drilling depth
D < Z1 ⇒ Deep drilling cycle with multiple infeeds and chip removal
Remaining drilling depth when through-drilling (inc) with FR feed
Nominal diameter of the thread
Pitch as a numerical value
Evaluation of thread pitch P
1 = Pitch in mm/rev
2 = Pitch in threads/inch
3 = Pitch in inches/rev
4 = Pitch as MODULE
Amount/percentage for each additional infeed (degression), see _AMODE
Minimum infeed (inc), only active for degression
Machining type
UNITS: Reserved
TENS:
0 = No chip removal before thread milling (only active at final drilling depth)
1 = Chip removal before thread milling (only active at final drilling depth)
HUNDREDS:
0 = Right-hand thread
1 = Left-hand thread
THOUSANDS:
0 = No remaining drilling depth with drilling feedrate FR
1 = Remaining drilling depth at drilling feedrate FR
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
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