Siemens SINUMERIK 840D sl Operating Manual page 355

Parameter Description
Swarf removal Swarf removal before thread milling
● Yes
● No
Return to workpiece surface for swarf removal before thread milling.
Thread Direction of rotation of the thread
● Right-hand thread
● Left-hand thread
F2 Feedrate for thread milling
Table Thread table selection:
● without
● ISO metric
● Whitworth BSW
● Whitworth BSP
● UNC
Selection - (not for Selection of table value: e.g.
table "Without")
● M3; M10; etc. (ISO metric)
● W3/4"; etc. (Whitworth BSW)
● G3/4"; etc. (Whitworth BSP)
● N1" - 8 UNC; etc. (UNC)
P Pitch ...
- (selection
● in MODULUS: MODULUS = Pitch/π
option only for ta‐
● in turns per inch: Used with pipe threads, for example.
ble selection "with‐
When entered per inch, enter the integer number in front of the decimal point in the
out")
first parameter field and the figures after the decimal point as a fraction in the second
and third field.
● in mm/rev
● in inch/rev
The pitch is determined by the tool used.
Z2 Retraction amount before thread milling
The thread depth in the direction of the tool axis is defined using Z2. Z2 is relative to the
tool tip.
∅ Nominal diameter
Milling direction
● Climb milling: Mill thread in one cycle.
● Up-cut operation milling: Mill thread in one cycle.
● Synchronous operation - Up-cut operation: Mill thread in two cycles: rough cutting is
performed by Up-cut operation milling with defined allowances, then finish cutting is
performed by climb milling with milling feedrate FS.
FS Finishing feedrate - (only for Synchronous operation - Up-cut operation milling)
Milling
Operating Manual, 05/2017, A5E40868956
Programming technological functions (cycles)
10.1 Drilling
Unit
mm/min
mm/tooth
MODULUS
Turns/"
mm/rev
in/rev
mm
mm
mm/min
mm/tooth
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