Siemens sinumerik 840D sl Operating Manual page 259

Parameters Description
Z1 Drilling depth (abs) or drilling depth in relation to Z0 (inc)
It is inserted into the workpiece until it reaches Z1. - (for tip centering only)
(only for G code)
Z1 (face) or Drilling depth (abs) or drilling depth in relation to Z0 of X0 (inc)
X1 (peripheral
The tool is inserted until Z1 or X1 is reached. - (for tip centering only)
surface)
(only for
ShopTurn)
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.
V3 Limit distance – (for stock removal only and manual limit distance)
Distance to the last infeed depth that the drill approaches in rapid traverse after stock
removal.
Dwell time at drilling depth in seconds
DTB 
Dwell time at drilling depth in revolutions

DT Dwell time at final drilling depth in seconds

Dwell time at final drilling depth in revolutions

Manual
Limit distance 
(for stock removal
The limit distance must be entered manually.
only)
Automatic

The limit distance is calculated by the cycle.

Turning
Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
Programming technology functions (cycles)
8.1 Drilling
Unit
mm
mm
%
mm
%
mm
mm
s
rev
s
rev
mm
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