Siemens SINUMERIK 840D sl Programming Manual page 682

Programming cycles externally
18.1 Technology cycles
No. Param Param
mask internal
15 αS _NSP
_VARI
16
_PITA
17
18 _PITM
_RTAB
19
20 _PTABA
21 _GMODE
22 _DMODE
_AMODE
23
682
Explanation
Start angle (multi-start thread)
Machining type
UNITS:
1 = Roughing
2 = Finishing
TENS:
1 = From top to bottom
2 = From bottom to top
HUNDREDS:
0 = Right-hand thread
1 = Left-hand thread
Evaluation of thread pitch
0 = Compatibility mode
1 = Pitch in mm
2 = Pitch in threads per inch (TPI)
3 = Pitch in inches
4 = Pitch as MODULE
String as marker for pitch input (for the interface only)
String for thread table ("", "ISO", "BSW", "BSP", "UNC") (for the interface only)
String for selection from thread table (e.g. "M 10", "M 12", ...) (for the interface only)
Geometrical mode
UNITS: Reserved
TENS: Reserved
HUNDREDS: Machining/calculation of start point
0 = Compatibility mode
1 = Normal machining
Display mode
UNITS: Machining plane G17/18/19
0 = Compatibility, the plane effective before cycle call remains active
1 = G17 (only active in the cycle)
2 = G18 (only active in the cycle)
3 = G19 (only active in the cycle)
Alternative mode
UNITS: Thread length (_DP)
0 = Absolute
1 = Incremental
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
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