Siemens SINUMERIK 840D sl Operating Manual page 312

Programming technology functions (cycles)
10.1 Drilling
Parameter Description
SP
(only for pilot
hole)
ZA - (only for Predrilling depth (abs) or predrilling depth in relation to Z0 (inc)
predrilling)
FA - (only for Predrilling feedrate as a percentage of the drilling feedrate
predrilling)
Predrilling feedrate (ShopTurn)
Predrilling feedrate (G code)
Soft first cut
● Yes
First cut with feedrate FS
● No
First cut with drilling feedrate
ZS1 Depth of each first cut with constant first cut feedrate FS (inc)
(only "Yes" for
soft first cut)
ZS2 Depth of each first cut for feedrate increase (inc)
(only "Yes" for
soft first cut)
FS First cut feedrate as a percentage of the drilling feedrate
(only "Yes" for
First cut feedrate (ShopTurn)
soft first cut)
First cut feedrate (G code)
Drilling
● One cut
interruption
● Chip breaking
● Swarf removal
● Chip breaking and swarf removal
D First drilling depth (abs) or first drilling depth in relation to Z0 (inc)
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.
312
Spindle position during approach (spindle off)
Unit
Degrees
mm
%
mm/min or mm/rev.
distance/min or dis‐
tance/rev
mm
mm
%
mm/min or mm/rev.
distance/min or dis‐
tance/rev
mm
%
mm
%
mm
Operating Manual, 05/2017, A5E40868721
Turning