Siemens SINUMERIK 840D sl Operating Manual page 353

Approach/retraction
1. The tool traverses with rapid traverse to the safety clearance.
2. If pre-drilling is required, the tool traverses at a reduced drilling feedrate to the predrilling
depth defined in a setting data (ShopMill/ShopTurn). When programming in G code, the
predrilling depth can be programmed using an input parameter.
1. The tool bores at drilling feedrate F1 to the first drilling depth D. If the final drilling depth Z1
is not reached, the tool will travel back to the workpiece surface in rapid traverse for stock
removal. Then the tool will traverse with rapid traverse to a position 1 mm above the drilling
depth previously achieved - allowing it to continue drilling at drill feedrate F1 at the next
infeed. Parameter "DF" is taken into account from the 2nd infeed and higher (refer to the
table "Parameters").
2. If another feedrate FR is required for through-boring, the residual drilling depth ZR is drilled
with this feedrate.
3. If required, the tool traverses back to the workpiece surface for stock removal before thread
milling with rapid traverse.
4. The tool traverses to the starting position for thread milling.
5. The thread milling is carried out (climbing, conventional or conventional + climbing) with
milling feedrate F2. The thread milling acceleration path and deceleration path is traversed
in a semicircle with concurrent infeed in the tool axis.
Procedure
Parameters, G code program
PL Machining plane
RP Retraction plane
SC Safety clearance
Milling
Operating Manual, 05/2017, A5E40868956
Machine manufacturer
Please also refer to the machine manufacturer's instructions.
1. The part program or ShopMill program to be processed has been created
and you are in the editor.
2. Press the "Drilling" softkey.
3. Press the "Thread" and "Drill and thread mill" softkeys.
The "Drilling and thread milling" input window opens.
mm
mm
Programming technological functions (cycles)
Parameters, ShopMill program
T Tool name
D Cutting edge number
F Feedrate
S / V Spindle speed or constant cutting
rate
10.1 Drilling
mm/min
mm/rev
rpm
m/min
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