Siemens SINUMERIK 828D Operating Manual page 575

Approach/retraction during chipbreaking
1. The tool drills at the programmed feedrate F as far as the first infeed depth.
2. For chipbreaking, the tool retracts by the retraction value V2 and drills as far as the next
infeed depth that can be reduced by the factor DF.
3. Step 2 is repeated until final drilling depth Z1 has been reached and dwell time DT has
expired.
4. The tool retracts to the safety clearance with rapid traverse.
Approach/retraction during stock removal
1. The tool drills at the programmed feedrate F as far as the first infeed depth.
2. The tool is retracted from the workpiece with rapid traverse to the safety clearance for
stock removal and is then re-inserted at the first infeed depth in the automatic mode
reduced by an anticipation distance calculated by the control system.
3. The tool then drills down to the next infeed depth that can be reduced by the factor DF
and the tool retracts again to Z0 + safety clearance for stock removal.
4. Step 3 is repeated until final drilling depth Z1 has been reached and dwell time DT has
expired.
5. The tool retracts to the safety clearance with rapid traverse.
Procedure
Turning
Operating Manual, 01/2015, 6FC5398-8CP40-5BA2
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.
Programming technology functions (cycles)
9.7 Additional cycles and functions in ShopTurn
575