Siemens SINUMERIK 840D, Operating Manual, Page: 272 / 610

Programming technological functions (cycles)
8.1 Drilling
Milling
272
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
Parameter Description Unit
Machining
position
(only for G
code)
 Single position
Drill hole at programmed position.
 Position pattern
Position with MCALL
Z0 (only for G
code)
Reference point Z mm
Machining
 Stock 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.
Z1 Drilling depth (abs) or drilling depth in relation to Z0 (inc)
It is inserted into the workpiece until it reaches Z1. mm
D - (only for G
code)
1. Drilling depth (abs) or 1st drilling depth in relation to Z0 (inc)
D - (only for
ShopMill)
Maximum depth infeed
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.
mm
%
V1 Minimum infeed - (only for DF in %)
Parameter V1 is provided only if DF< 100 has been programmed.
If the infeed increment becomes minimal, 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. mm
V3 Clearance distance – (for stock removal only and manual clearance distance)
Distance to the last infeed depth that the drill approaches in rapid traverse after stock
removal.
mm