Siemens SINUMERIK 840D sl Turning Operating Manual page 421

Parameter
LW
or
LW2
or
LW2 = LR
LR
H1
DP
or
αP
D0
D1 or ND
(only for ∇ and
∇ + ∇∇∇)
½
or 1
U
NN
VR
Turning
Operating Manual, 06/2019, A5E44903486B AB
Description
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 indi‐
vidual 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.
Infeed along the flank
Infeed with alternating flanks (alternative)
Instead of infeed along one flank, you can infeed along alternating flanks to avoid
always loading the same tool cutting edge. As a consequence you can increase the
tool life.
α > 0: Start at the rear flank
α < 0: Start at the front flank
Initial plunge depth – (only for ∇ and ∇ + ∇∇∇ under "Manual Machine")
If you want to rework some threads, input the initial plunge depth D0 (inc.). This is the
depth that was reached during a previous machining.
By inputting the plunge depth, you avoid unnecessary idle cuts when reworking the
threads.
First infeed depth or number of roughing cuts
The respective value is displayed when you switch between the number of roughing
cuts and the first infeed.
Halve first infeed depth
First infeed depth normal
Finishing allowance in X and Z – (only for ∇ and ∇ + ∇∇∇)
Number of noncuts - (only for ∇∇∇ and ∇ + ∇∇∇)
Return distance (inc)
Programming technology functions (cycles)
10.2 Rotate
Unit
mm
mm
mm
mm
mm
mm
Degrees
mm
mm
mm
mm
421