Siemens SINUMERIK 840D sl Turning Operating Manual page 556

Programming technology functions (cycles)
10.4 Milling
Parameter Description
Machining direction:
● Z0 → Z1
Machining from top to bottom
● Z1 → Z0
Machining from bottom to top
Direction of rotation of the thread:
● Right-hand thread
A right-hand thread is cut.
● Left-hand thread
A left-hand thread is cut.
Position of the thread:
● Internal thread
An internal thread is cut.
● External thread
An external thread is cut.
NT Number of teeth per cutting edge
Single or multiple toothed milling inserts can be used. The motions required are executed
by the cycle internally, so that the tip of the bottom tooth on the milling tool cutting edge
corresponds to the programmed end position when the thread end position is reached.
Depending on the cutting edge geometry of the milling insert, the retraction path must be
taken into account at the base of the workpiece.
Machining position:
● Single position
(only for G code)
● Position pattern (MCALL)
The positions refer to the center point:
X0 Reference point X – (only for single position)
Y0 Reference point Y – (only for single position)
Z0 Reference point Z
(only for G code)
Z1 End point of the thread (abs) or thread length (inc)
Table Thread table selection:
● Without
● ISO metric
● Whitworth BSW
● Whitworth BSP
● UNC
Selection - (not for Selection, table value: e.g.
table "without")
● M3; M10; etc. (ISO metric)
● W3/4"; etc. (Whitworth BSW)
● G3/4"; etc. (Whitworth BSP)
● N1" - 8 UNC; etc. (UNC)
P Display of the thread pitch for the parameter input in the input field "Table" and "Selection". MODULUS
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Operating Manual, 06/2019, A5E44903486B AB
Unit
mm
mm
mm
mm
turns/"
mm/rev
in/rev
Turning