Siemens SINUMERIK 840D Operating Manual

Programming technological functions (cycles)
8.2 Milling
Milling
298 Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
Parameters Description Unit
DXY
 Maximum plane infeed
 Maximum plane infeed as a percentage of the cutting tool diameter
- (only for ∇ and ∇∇∇)
in
%
DZ Maximum depth infeed - (only for ∇, ∇∇∇ and ∇∇∇ Rand) mm
UXY Plane finishing allowance - (only for ∇, ∇∇∇ and ∇∇∇ edge) mm
UZ Depth finishing allowance – (only for ∇ and ∇∇∇) mm
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 in 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, predrilled and perpendicular) mm/min
FZ Depth infeed rate - (only for insertion, predrilled and perpendicular) mm/min
mm/tooth
EP Maximum pitch of helix - (for helical insertion only)
The helix pitch may be lower due to the geometric conditions.
mm/rev
ER Radius of helix - (only for helical insertion)
The radius must not be larger than the cutter radius, otherwise material will
remain. Also make sure the circular pocket is not violated
mm
Solid machining
 Complete machining
The circular pocket must be milled from a solid workpiece (e.g. casting).
 Editing
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) mm
ZFS Insertion depth of tool tip (abs or inc) - (for chamfering only) mm
AZ Depth of premachining - (for remachining only) mm
∅1 Diameter of premachining - (for remachining only) mm

Siemens SINUMERIK 840D Specifications

General

Series	SINUMERIK 840D
Axes	Up to 31
Channels	Up to 10
Operating System	Windows-based
Power Supply	24 V DC
Control Unit Type	CNC
Interface	Ethernet, PROFIBUS
Display	TFT color display
Interpolation	Spline
PLC	Integrated PLC
Data Storage	CompactFlash, USB