Siemens SINUMERIK 840D sl Operating Manual page 496

Programming technological functions (cycles)
10.4 Turning - milling/turning machine
Parameter
D1 or ND
(only for ∇ and
∇ + ∇∇∇)
rev
NN
VR
Multiple threads
Parameters in the "input simple" mode (face thread)
G code program parameters
Input
496
Description
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 thread turns
The thread turns are distributed evenly across the periphery of the
turned part; the 1st thread is always placed at 0°.
DA Thread changeover depth (inc)
First machine all thread turns sequentially to thread changeover
depth DA, then machine all thread turns sequentially 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.
Machining:
● Complete, or
● From thread N1
N1 (1...4) start thread N1 = 1...N
● Only thread NX
NX (1...4) 1 from N threads
● simple
or
ShopMill program parameters
T Tool name
D Cutting edge number
S / V Spindle speed or
Constant cutting rate
Operating Manual, 05/2017, A5E40868956
Unit
mm
mm
mm
Degrees
mm
rpm
m/min
Milling