Siemens SINUMERIK 840D sl Operating Manual page 354

Programming technological functions (cycles)
10.1 Drilling
Parameter Description
Machining posi‐
● Single position
tion (only for G
Drill hole at programmed position
code)
● Position pattern
Position with MCALL
F1 Drilling feedrate
(only for G-code)
Z0 (only for G Reference point Z
code)
Z1 Thread length (inc) or end point of the thread (abs)
D Maximum depth infeed
● D ≥ Z1: Infeed to the final drilling depth
● D < Z1: Several infeeds with stock removal
DF
● Percentage for each additional infeed
DF=100: Infeed increment remains constant
DF<100: Amount of infeed is reduced in direction of final drilling depth Z1
Example: last infeed 4 mm; DF 80%
next infeed = 4 x 80% = 3.2 mm
next but one infeed = 3.2 x 80% = 2.56 mm etc.
● Amount for each additional infeed
V1 Minimum infeed - (only for DF, percentage for each additional infeed)
Parameter V1 is only provided 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.
Predrilling Predrilling with reduced feedrate
● Yes
● No
The reduced drilling feedrate is obtained as follows:
Drilling feedrate F1 < 0.15 mm/rev: Predrilling feedrate = 30% of F1
Drilling feedrate F1 ≥ 0.15 mm/U: Predrilling feedrate = 0.1 mm/rev
ZA Predrill to the depth with reduced drilling feedrate (inc) - ("yes", only for predrilling)
Through drilling Remaining drilling depth with drilling feedrate
● Yes
● No
ZD Depth for feedrate reduction - ("yes", only for through drilling)
FD Feedrate for through drilling - ("yes", only for through drilling)
354
Unit
mm/min
mm/rev
mm
mm
mm
%
mm
mm
mm
mm
mm/min
mm/rev
Operating Manual, 05/2017, A5E40868956
Milling