Siemens sinumerik 840D sl Operating Manual page 360

Programming technology functions (cycles)
8.4 Milling
Parameter Description
Peripheral surface Y: The positions refer to the reference point:
C0 Positioning angle for machining surface – (only for single position)
Y0 Reference point Y – (only for single position)
Z0 Reference point Z – (only for single position)
X0 Reference point X – (only for single position)
(only for
ShopTurn)
N Number of slots
R Radius of circumferential slot
α0 Starting angle
α1 Opening angle of the slot
α2 Advance angle - (for pitch circle only)
W Slot width
Z1 or X1 Slot depth (abs) or depth relative to Z0 or X0 (inc) - (only for ∇, ∇∇∇)
(Z1 for machining surface, face C/Y or X1 for peripheral surface C/Y)
DZ or DX Maximum depth infeed - (only for ∇, ∇∇∇ )
(DZ for machining surface, face C/Y or DX for peripheral surface C/Y)
UXY or UYZ Plane finishing allowance – (only for ∇, ∇∇∇)
(UXY for machining surface, face C/Y or UYZ for peripheral surface C/Y)
Positioning Positioning motion between the slots:
Straight line:

Next position is approached linearly in rapid traverse.
Circular:

Next position is approached along a circular path at the feedrate
defined in a machine data code.
FS Chamfer width for chamfering (inc) - (for chamfering only)
ZFS (only for G Insertion depth of tool tip (abs or inc) - (for chamfering only)
code)
ZFS or XFS Insertion depth of tool tip (abs or inc) - (for chamfering only)
(only for
(ZFS for machining surface, face C/Y or XFS for peripheral surface C/Y)
ShopTurn)
360
Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
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Turning