Siemens SINUMERIK 840D sl Operating Manual page 496

Programming technology functions (cycles)
8.7 Additional cycles and functions in ShopTurn
Procedure
Parameters Description
T Tool name
D Cutting edge number
F Feedrate
S / V Spindle speed or
constant cutting rate
Machining
Chipbreaking

Stock removal

Z0 Reference point Z
Drilling depth Referred to
Shank

The drill is inserted until the drill shank reaches the value programmed for Z1. The
angle entered in the tool list is taken into account.
Tip

The drill is inserted until the drill tip reaches the value programmed for Z1.
Z1 Final drilling depth X (abs) or final drilling depth in relation to Z0 (inc)
D Maximum depth infeed
FD1 Percentage for the feedrate for the first infeed
DF
Percentage for each additional infeed or

Amount for each additional infeed

DF = 100: Infeed increment remains constant
DF < 100: Infeed increment is reduced in direction of final drilling depth.
Example: DF = 80
Last infeed was 4 mm;
4 x 80% = 3.2; next infeed increment is 3.2 mm
3.2 x 80% = 2.56; next infeed increment is 2.56 mm, etc.
V1 Minimum depth infeed
Parameter V1 is available only if DF<100% has been programmed.
A minimum infeed is programmed using parameter V1.
V2 Retraction distance after each machining step – (only for "chipbreaking" operation)
496
1. The ShopTurn program to be edited has been created and you are in
the editor.
2. Press the "Drilling" and "Drill centric" softkeys.
The "Drilling centered" input window opens.
Operating Manual, 02/2012, 6FC5398-8CP40-3BA0
Unit
mm/min
mm/rev
rpm
m/min
%
%
mm
Turning