Siemens SINUMERIK 840D Operation/Programming Manual page 240

3
Programming with ShopMill
3.7 Drilling
Parameters
Machining type Roughing
Thread cutting up to programmed finishing allowance (U)
Finishing
Direction Depending on the rotational direction of the spindle, a change in direction also
changes the machining direction (climb/conventional).
Z0 to Z1: Machining starts at workpiece surface Z0.
Z1 to Z0: The machining starts at thread depth, e.g. for blind hole tapping
Internal thread An inside thread is cut.
External thread An outside thread is cut.
Left-hand A left-hand thread is cut.
thread
Right-hand A right-hand thread is cut.
thread
NT Number of teeth in a milling insert.
Single or multiple toothed milling inserts can be used. The cutting teeth are entered
in parameter NT. The motions required are executed by the cycle internally, so that
the tip of the bottom tooth on the milling insert corresponds to the programmed end
position when the thread end position is reached. Depending on the cutting edge
geometry of the milling insert, the retraction path must be taken into account at the
base of the workpiece.
Z1 Thread length
Z0 Height of workpiece; Z0 is specified in the position pattern ("Positioning" softkey).
∅ Nominal thread diameter, example: Nominal diameter of M12 = 12mm
P Pitch
If the cutter has several teeth, the thread pitch is determined by the tool.
For a thread pitch entered in turns/'', enter the integer in front of the decimal point in
the first parameter field and the figures after the decimal point as a fraction in the
second and third fields.
For example, 13.5 turns/" is entered as follows:
K Thread depth
DXY Infeed per cut
Alternately, you can specify the plane infeed as a %, as a ratio --> plane infeed (mm)
to milling cutter diameter (mm).
U Final machining allowance
α0 Start angle
3-240
Description
SINUMERIK 840D/840Di/810D Operation/Programming ShopMill (BAS) – 10.04 Edition
3
10.04
Unit
mm
mm
mm
mm/rev
inch/rev
MODULE
Turns/ "
mm
mm
%
mm
Degr.
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