Siemens SINUMERIK 840D sl Operating Manual page 363

Parameter
Infeed (only for ∇ and
∇ + ∇∇∇)
Thread
X0
Z0
Z1
Amount of crown
LW
or
LW2
or
LW2 = LR
LR
H1
DP
or
αP
Turning
Operating Manual, 05/2017, A5E40868721
Description
● 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.
Allowance to compensate for sag ( - only for external thread and G= 0)
● XS
Segment height, crowned thread
● RS
Radius crowned thread
Positive values: Convex
Negative values: Concave
Note:
the pitch change per revolution "G" must be "0".
Thread advance (inc)
The starting point for the thread is the reference point (X0, Z0) brought forward by
the thread advance W. The thread advance can be used if you wish to begin the
individual cuts slightly earlier in order to also produce a precise start of thread.
Thread run-in (inc)
The thread run-in can be used if you cannot approach the thread from the side and
instead have to insert the tool into the material (e.g. lubrication groove on a shaft).
Thread run-in = thread run-out (inc)
Thread run-out (inc)
The thread run-out can be used if you wish to retract the tool obliquely at the end of
the thread (e.g. lubrication groove on a shaft).
Thread depth from thread table (inc)
Infeed slope as flank (inc) – (alternative to infeed slope as angle)
DP > 0: Infeed along the rear flank
DP < 0: Infeed along the front flank
Infeed slope as angle – (alternative to infeed slope as flank)
α > 0: Infeed along the rear flank
α < 0: Infeed along the front flank
α = 0: Infeed at right angle to cutting direction
If you wish to infeed along the flanks, the maximum absolute value of this parameter
may be half the flank angle of the tool.
Programming technology functions (cycles)
10.2 Rotate
Unit
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
Degrees
363