Siemens SINUMERIK 840D, Operating Manual, Page: 308 / 610

Programming technological functions (cycles)
8.2 Milling
Milling
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Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
Parameter Description Unit
Insertion The following insertion modes can be selected:

Predrilled: (only for G code)
Approach of reference point shifted by the amount of the safety clearance with G0.

Perpendicular: Insert vertically in longitudinal groove center:
The tool is inserted to infeed depth in the pocket center.
Note: This setting can be used only if the cutter can cut across center.
 Helical: Insert along helical path
The cutter center point traverses along the helical path determined by the radius
and depth per revolution (helical path). If the depth for one infeed has been
reached, a full longitudinal slot is machined to eliminate the inclined insertion path.

Oscillating: Insert with oscillation along center axis of longitudinal groove:
The cutter center point oscillates along a linear path until it reaches the depth
infeed. When the depth has been reached, the path is traversed again without
depth infeed in order to eliminate the inclined insertion path.
mm
FZ Depth infeed rate mm/min
FZ Depth infeed rate - (for perpendicular insertion only) mm/min
mm/tooth
EW Maximum insertion angle - (for insertion with oscillation only) Degrees
FS Chamfer width for chamfering (inc) - (for chamfering only), mm
ZFS Insertion depth of tool tip (abs or inc) - (for chamfering only) mm
8.2.8 Circumferential groove (SLOT2)
Function
You can mill one or several circumferential grooves of equal size on a full or pitch circle with
the "circumferential groove" cycle.
Tool size
Please note that there is a minimum size for the milling cutter used to machine the
circumferential groove:
●
Roughing:
1⁄2 groove width W – finishing allowance UXY ≤ milling cutter diameter
● Finishing:
1⁄2 groove width W ≤ milling cutter diameter
● Edge finishing:
Finishing allowance UXY ≤ milling cutter diameter