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

Programming cycles externally
16.1 Technology cycles
16.1.9

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 Mask Param intern
1
RP _RTP
2
Z0 _RFP
3
SC _SDIS
4
Z1 _DP
5
_ADPR
6
D _FDPR
7
ZR _LDPR
8
? -_DIAM
9
P _PIT
10
_PITA
11
DF _DAM
12
V1 _MDEP
13
_VARI
756
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 swarf removal
Remaining drilling depth when through-boring (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 swarf removal before thread milling (only active at final drilling depth)
1 = Swarf 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
TEN THOUSANDS:
0 = No predrilling with reduced feedrate
1 = Predrilling with reduced feedrate
Predrilling feed rate = 0.3 F1, if F1< 0.15 mm/rev
Predrilling feedrate = 0.1 mm/rev, if F1 ≥ 0.15 mm/rev
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
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