Siemens SINUMERIK 840D sl Operating Manual page 199

Parameter
αP
D1 or ND
(only for ∇ and
∇ + ∇∇∇)
rev
NN
VR
Multiple
N
DA
Machining
1) Parameter description refers to plane G18; plane selection G17 or G19 possible in selection field
(MD 52006: $MCS_DISP_PLANE_TURN)!
HMI sl Turning
Operating Manual, 01/2008, 6FC5398-7AP10-0BA0
Description
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 alternate flanks (alternative)
Instead of infeed along one flank, you can infeed along alternate flanks to avoid
loading the same tool cutting edge at all times, and thus increase the tool life.
α > 0: Start at rear flank
α < 0: Start at front flank
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.
Finishing allowance in X and Z – (only for ∇ and ∇ + ∇∇∇)
Number of noncuts - (only for ∇∇∇ and ∇ + ∇∇∇)
Return distance (inc)
No
•
– α0 starting angle offset
Yes
•
– N number of threads
– DA thread changeover depth (inc)
– Machining: Complete or as of thread N1 (as of this thread) or
only thread X
– NX 1 of N threads (NX = 1...N)
Number of threads
The threads are distributed evenly across the periphery of the turned part; the first
thread is always placed at 0°.
Thread changeover depth (inc)
First machine all threads in sequence to thread change depth DA, then machine
all threads in sequence to depth 2 · DA, etc., until the final depth is reached.
DA = 0: Thread changeover depth is not taken into account, i.e. finish machining
each thread before starting the next thread.
Complete
•
As of thread N1 (1...N)
•
Machine from N1 to N
Only thread -NX (1...N)
•
NX ≠ 0: Only machine thread NX
NX = 0: Machine all threads
Programming a cycle
4.5 Rotate
Unit
Degrees
mm
mm
mm
mm
199