Siemens SINUMERIK 840D sl Operating Manual page 313

Parameter Description
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 dis‐
● Manual
tance
The clearance distance must be entered manually.
(only for swarf
● Automatic
removal and
The clearance distance is calculated by the cycle.
soft first cut
"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
ZD - (only for Depth for through drilling feedrate (abs) or depth for through drilling feedrate in rela‐
through drilling tion to Z1 (inc)
"yes")
FD - (only for Feedrate for through drilling referred to drilling feedrate F.
through drilling
Feedrate for through drilling (ShopTurn).
"yes")
Feedrate for through drilling (G code).
DT - (only for
● Dwell time at final depth in seconds
through drilling
● Dwell time at final depth in revolutions
"no")
Retraction ● Retraction to pilot hole depth
● Retraction to retraction plane
FR Retraction in rapid traverse
Direction of
●
spindle rotation
Retraction with stationary spindle
during retrac‐
●
tion
●
Turning
Operating Manual, 05/2017, A5E40868721
Programming technology functions (cycles)
10.1 Drilling
Unit
mm
s
rev
mm
s
rev
mm
%
mm/min or mm/rev.
distance/min or dis‐
tance/rev
s
U
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