Siemens sinumerik 840D sl Operating Manual page 342

Programming technology functions (cycles)
8.4 Milling
Procedure
Parameters, G code program
PL Machining plane
Milling direction
RP Retraction plane
SC Safety clearance
F Feedrate
Parameters Description
Face C
Machining

surface
Face Y

(only for
Peripheral surface C

ShopTurn)
Peripheral surface Y

Please note that when machining in the face C and peripheral surface C planes,
clamping only remains active for the drilling operation. On the other hand, when
machining in the face Y and peripheral surface Y planes, clamping is modal, i.e. it
remains active until the machining plane is changed.
∇ (roughing, plane-by-plane or helical)
Machining 
∇∇∇ (finishing, plane-by-plane or helical)

∇∇∇ edge (edge finishing, plane-by-plane or helical)

Chamfering

Plane by plane
Machining type 
Solid machine circular pocket plane-by-plane
Helical

Solid machine circular pocket helically
Single position
Machining 
position
A circular pocket is machined at the programmed position (X0, Y0, Z0).
Position pattern

Several circular pockets are machined in a position pattern
(e.g. full circle, pitch circle, grid, etc.).
342
1. The part program or ShopTurn program to be processed has been
created and you are in the editor.
2. Press the "Milling" softkey.
3. Press the "Pocket" and "Circular pocket" softkeys.
The "Circular Pocket" input window opens.
mm
mm
mm/min
Parameters, ShopTurn program
T Tool name
D Cutting edge number
F Feedrate
S / V Spindle speed or constant
cutting rate
Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
mm/min
mm/rev
rpm
m/min
Unit
Turning