Siemens SINUMERIK 840D sl Operating Manual page 304

Programming technology functions (cycles)
10.1 Drilling
Parameter Description
Position ● At the front (face)
(only for Shop‐
● At the rear (face)
Turn)
● Outside (peripheral surface)
● Inside (peripheral surface)
Clamp/release spindle
The function must be set up by the machine manufacturer.
(only for Shop‐
Turn)
Machining ● Swarf removal
The drill is retracted from the workpiece for swarf removal.
● Chip breaking
The drill is retracted by the retraction distance V2 for chip breaking.
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 1st drilling depth (abs) or 1st drilling depth with respect to Z0 (inc.)
(only for G code)
D (only for Shop‐ Maximum depth infeed.
Turn)
FD1 Percentage for the feedrate at the first infeed.
DF Infeed:
● Degression amount by which each additional infeed is reduced.
● 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.
304
Unit
mm
mm
mm
%
mm
%
mm
Operating Manual, 05/2017, A5E40868721
Turning