Siemens SINUMERIK 840D sl Operating Manual page 299

Parameter Description
Machining
Chip removal

The drill is retracted from the workpiece for stock removal.
Chipbreaking

The drill is retracted by the retraction distance V2 for chipbreaking.
Drilling depth
Shank (drilling depth in relation to the shank)

The drill is inserted into the workpiece until the drill shank reaches the value
programmed for Z1. The angle entered in the tool list is taken into account.
Tip (drilling depth in relation to the tip)

The drill is inserted into the workpiece until the drill tip reaches the value
programmed for Z1.
Note: If it is not possible to define an angle for the drill in the tool management, it will
not be possible to select tip or shank (always tip, 0 field)
Z1 Drilling depth (abs) or drilling depth in relation to Z0 (inc)
It is inserted into the workpiece until it reaches Z1.
D 1. Drilling depth (abs) or 1st drilling depth in relation to Z0 (inc)
(only for G code)
D (only for Maximum depth infeed
ShopTurn)
FD1 Percentage for the feedrate for the first infeed
DF Infeed:
Amount for each additional infeed

Percentage for each additional infeed

DF = 100%: Infeed increment remains constant
DF < 100%: Infeed increment is reduced in direction of final drilling depth.
Example: last infeed was 4 mm; DF is 80%
next infeed = 4 x 80% = 3.2 mm
next infeed = 3.2 x 80% = 2.56 mm etc.
V1 Minimum infeed - (only for DF in %)
Parameter V1 is only available if DF< 100 has been programmed.
If the infeed increment becomes very small, a minimum infeed can be programmed in
parameter "V1".
V1 < Infeed increment: The tool is inserted by the infeed increment
V1 > Infeed increment: The tool is inserted by the infeed value programmed under V1.
V2 Retraction distance after each machining step – (for chipbreaking only)
Distance by which the drill is retracted for chipbreaking.
V2 = 0: The tool is not retracted but is left in place for one revolution.
Limit distance (for
Manual

stock removal
The limit distance must be entered manually.
only)
Automatic

The limit distance is calculated by the cycle.
Turning
Operating Manual, 02/2012, 6FC5398-8CP40-3BA0
Programming technology functions (cycles)
8.1 Drilling
Unit
mm
mm
mm
%
mm
%
mm
mm
299