Siemens SINUMERIK 840D sl Operating Manual page 490

Programming technological functions (cycles)
10.4 Turning - milling/turning machine
Parameter
αC
(for ShopMill program)
Hirth joint
Tool
Preferred direction (for
ShopMill program)
P
Machining
Infeed (only for ∇ and ∇
+ ∇∇∇)
Thread
X0
Z0
Z1
490
Description
Rotational position for a pole position
● Round to the next Hirth joint
● Round up to Hirth joint
● Round down to Hirth joint
Note:
For machines with a Hirth joint
Tool tip when swiveling
● Tracking
The position of the tool tip is maintained during swiveling.
● No tracking
The position of the tool tip is not maintained during swiveling.
Preferred direction of the swivel axis for several possible alignments of the machine
Select the thread pitch/turns:
● Thread pitch in mm/revolution
● Thread pitch in inch/revolution
● Thread turns per inch
● Thread pitch in MODULUS
● ∇ (roughing)
● ∇∇∇ (finishing)
● ∇ + ∇∇∇ (roughing and finishing)
● Linear:
Infeed with constant cutting depth
● Degressive:
Infeed with constant cutting cross-section
● Internal thread
● External thread
Reference point X from thread table ∅ (abs)
Reference point Z (abs)
End point of the thread (abs) or thread length (inc)
Incremental dimensions: The sign is also evaluated.
Unit
Degrees
mm/rev
in/rev
turns/"
MODULUS
mm
mm
mm
Operating Manual, 05/2017, A5E40868956
Milling