Siemens Sinumerik 840D sl Programming Manual page 808

Programming cycles externally
16.1 Technology cycles
Param Param
No.
Mask intern
14
_VARI
15
N _NUMTH
16
VR _SDIS
17
D1 _MID
18
DA _GDEP
19
G _PIT1
20
_FDEP
21
N1 _GST
22
_GUD
23
_IFLANK
24
_PITA
808
Explanation
Machining type
UNITS: Technology
1 = External thread with linear infeed
2 = Internal thread with linear infeed
3 = External thread with degressive infeed, cross-section of cut remains constant
4 = Internal thread with degressive infeed, cross-section of cut remains constant
TENS: Reserved
HUNDREDS: Infeed type
1 = Infeed on one side
2 = Infeed alternate sides
THOUSANDS: Reserved
TEN THOUSANDS: Alternative depth infeed
0 = Preset number of roughing cuts (_NRC)
1 = Preset value for 1st infeed (_MID)
HUNDRED THOUSANDS: Machining type
1 = Roughing
2 = Finishing
3 = Roughing and finishing
MILLION: Machining sequence for multistart thread
0 = In ascending order of threads
1 = In descending order of threads
Number of threads
Return distance, inc
First infeed depth, see _VARI (TEN THOUSANDS)
Thread changeover depth
0 = Do not observe any thread changeover depth
> 0 = Observe thread changeover depth
Change of pitch per revolution
0 = Pitch is constant (G33)
> 0 = Pitch increases (G34)
> 0 = Pitch reduces (G35)
Insertion depth (enter without sign)
Starting thread N1 = 1...N, see _AMODE (HUNDRED THOUSANDS)
Reserved
Infeed slope as width (for interface only)
Pitch unit (evaluation of PIT and/or MPIT)
0 = Pitch in mm - MPIT/PIT evaluation
1 = Pitch in mm - PIT evaluation
2 = Pitch in TPI - evaluation of PIT (threads per inch)
3 = Pitch in inches - PIT evaluation
4 = MODULE- evaluation of PIT
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
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