Siemens SINUMERIK 840D sl Operating Manual page 346

Programming technological functions (cycles)
8.2 Milling
Parameter Description
UXY Plane finishing allowance - (only for ∇, ∇∇∇ and ∇∇∇ edge)
UZ Depth finishing allowance – (only for ∇ and ∇∇∇)
Insertion Various insertion modes can be selected – (only for plane-by-plane
machining method and for ∇, ∇∇∇ or ∇∇∇ edge):
Predrilled (only for G code)
•
Perpendicular: Insert vertically at the center of pocket
•
The tool executes the calculated depth infeed vertically in the center of
the pocket.
Feedrate: Infeed rate as programmed under FZ
Helical: Insert along helical path
•
The cutter center point traverses along the helical path determined by
the radius and depth per revolution. If the depth for one infeed has been
reached, a full circle motion is executed to eliminate the inclined
insertion path.
Feedrate: Machining feedrate
Note: The vertical insertion into pocket center method can be used only
if the tool can cut across center or if the workpiece has been predrilled.
FZ Depth infeed rate – (only for insertion and vertical insertion)
(only for G code)
FZ Depth infeed rate – (only for insertion and vertical insertion)
(only for ShopMill)
EP Maximum pitch of helix - (for helical insertion only)
The helix pitch may be lower due to the geometrical situation.
ER Radius of helix - (only for helical insertion)
The radius must not be larger than the milling cutter radius, otherwise
material will remain. Also make sure the circular pocket is not violated
Solid machining
Complete machining
•
The circular pocket must be milled from a solid workpiece (e.g. casting).
Post machining
•
A small pocket or hole has already been machined in the workpiece.
This needs to be enlarged. Parameters AZ, and ∅1 must be
programmed.
FS Chamfer width for chamfering - (for chamfering only)
ZFS Insertion depth of tool tip (abs or inc) - (for chamfering only)
AZ Depth of premachining - (for remachining only)
∅1 Diameter of premachining - (for remachining only)
* Unit of feedrate as programmed before the cycle call
346
Unit
mm
mm
*
mm/min
mm/tooth
mm/rev
mm
mm
mm
mm
mm
Operating Manual, 03/2013, 6FC5398-7CP40-3BA1
Milling