Siemens SINUMERIK 828D Operating Manual page 318

Programming technology functions (cycles)
9.1 Drilling
Parameter Description
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.
V2 Retraction distance after each machining step.
(only for chip Distance by which the drill is retracted for chip breaking.
breaking and
V2 = 0: The tool is not retracted but is left in place for one revolution.
soft first cut
"no")
DTB
Dwell time at drilling depth in seconds
•
Dwell time at drilling depth in revolutions
•
Clearance
Manual
•
distance
The clearance distance must be entered manually.
(only for swarf
Automatic
•
removal and
soft first cut
The clearance distance is calculated by the cycle.
"no")
V3 – (for "man- Clearance distance (inc)
ual" clearance
distance only)
N - (only for Number of chip breaking strokes before each swarf removal operation.
"chip breaking
and swarf re-
moval")
Retraction for
Swarf removal at the pilot hole depth
•
swarf removal
Swarf removal at the safety clearance
•
DTS
Dwell time for swarf removal in seconds
•
Dwell time for swarf removal in revolutions
•
Through drilling •
Yes
Through drilling with feedrate FD
No
•
318
Operating Manual, 01/2015, 6FC5398-8CP40-5BA2
Unit
%
mm
%
mm
mm
s
rev
mm
s
rev
Turning