Siemens SINUMERIK 840D sl Operating Manual page 488

Programming technological functions (cycles)
10.4 Turning - milling/turning machine
Parameter
Multiple threads
Parameters in the "input simple" mode (longitudinal thread)
G code program parameters
Input
488
Description
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 x
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
Degrees
mm
rpm
m/min
Milling