Open Groove (Cycle899) - Siemens SINUMERIK 840D sl Operating Manual

Programming technology functions (cycles)
8.4 Milling
Parameter Description
α2 Advance angle - (for pitch circle only)
W Slot width
Z1 Slot depth (abs) or depth relative to Z0 or X0 (inc) - (only for ∇, ∇∇∇)
DZ Maximum depth infeed - (only for ∇, ∇∇∇ )
UXY Plane finishing allowance – (only for ∇, ∇∇∇)
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 Insertion depth of tool tip (abs or inc) - (for chamfering only)
* Unit of feedrate as programmed before the cycle call
8.4.9

Open groove (CYCLE899)

Function
Use the "Open slot" function if you want to machine open slots.
For roughing, you can choose between the following machining strategies, depending on
your workpiece and machine properties.
● Vortex milling
● Plunge cutting
The following machining types are available to completely machine the slot:
● Roughing
● Rough-finishing
● Finishing
● Base finishing
● Edge finishing
● Chamfering
Vortex milling
Particularly where hardened materials are concerned, this process is used for roughing and
contour machining using coated VHM milling cutters.
Vortex milling is the preferred technique for HSC roughing, as it ensures that the tool is
never completely inserted. This means that the set overlap is precisely maintained.
420
Operating Manual, 02/2012, 6FC5398-8CP40-3BA0
Unit
Degrees
mm
mm
mm
mm
mm
mm
Turning