Siemens SINUMERIK 840D SL Operating Manual page 404

Programming technological functions (cycles)
8.4 Turning - only for G code programs
Approach/retraction
1. The tool moves to the starting point calculated internally in the cycle at rapid traverse.
2. Thread with advance:
3. The first cut is made with thread pitch P as far as the thread run-out LR.
4. Thread with advance:
5. Steps 3 and 4 are repeated until the thread is finished.
6. The tool moves back to the retraction plane at rapid traverse.
Thread machining can be stopped at any time with the "Rapid lift" function. It ensures that
the tool does not damage the thread when it is raised.
Procedure for longitudinal thread, tapered thread, or face thread
404
The tool moves at rapid traverse to the first starting position displaced by the thread
advance LW.
Thread with run-in:
The tool moves at rapid traverse to the starting position displaced by the thread run-in
LW2.
The tool moves at rapid traverse to the return distance VR and then to the next starting
position.
Thread with run-in:
The tool moves at rapid traverse to the return distance VR and then back to the starting
position.
1. The part program to be executed has been created and you are in the
editor.
2. Press the "Turning" softkey.
3. Press the "Thread" softkey.
The "Thread" input window opens.
4. Press the "Longitudinal thread" softkey.
The "Longitudinal Thread" input window opens.
- OR -
Press the "Tapered thread" softkey.
The "Tapered Thread" input window opens.
- OR -
Press the "Face thread" softkey.
The "Face Thread" input window opens.
Operating Manual, 02/2012, 6FC5398-7CP40-3BA0
Milling