Siemens SINUMERIK 840D sl Operating Manual page 374

Programming technology functions (cycles)
10.2 Rotate
Parameter
Multiple threads
Parameter "Face thread" in the "Input simple" mode
G code program parameters
Input
Parameter
P
Machining
Infeed (only for ∇ and ∇
+ ∇∇∇)
374
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 turn is always located 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 turn N1
N1 (1...4) start thread N1 = 1...N
● Only thread NX
NX (1...4) 1 from N threads
● simple
Description
Select the thread pitch / turns for table "Without" or specify the thread pitch/turns
corresponding to the selection in the thread table:
● Thread pitch in mm/revolution
● Thread pitch in inch/revolution
● Thread turns per inch
● Thread pitch in MODULUS
● ∇ (roughing)
● ∇∇∇ (finishing)
● ∇ + ∇∇∇ (roughing and finishing)
● Linear:
Infeed with constant cutting depth
● Degressive:
Infeed with constant cutting cross-section
or
ShopTurn program parameters
T Tool name
D Cutting edge number
S / V Spindle speed or constant cutting
rate
Operating Manual, 05/2017, A5E40868721
Unit
Degrees
mm
rpm
m/min
Unit
mm/rev
in/rev
turns/"
MODULUS
Turning