Siemens SINUMERIK 808D Programming And Operating Manual page 62

Manual machining
3.4 Manual machining using cycles (functions)
Thread cutting
The machining sequence is as follows:
1. Starting from the current axis position, the start position for the thread (d1/z0) is
2. This is followed by infeed by the first depth of cut.
3. The controller then waits for the next zero mark from the spindle encoder in order to start
4. Once the end position for the thread has been reached in both axes, the tool is withdrawn
5. The start position for the thread is then approached in the longitudinal and transverse
6. Infeed to the next depth of cut.
7. Wait for the next marker pulse from the spindle encoder to start the axes...
8. There is now a choice of 2 options:
See also
Principle operating sequence (Page 38)
General parameters (Page 41)
62
approached in rapid traverse.
the axis movements (longitudinal axis and/or transverse axis) (depending on the thread
geometry).
from the workpiece in rapid traverse.
axis in rapid traverse, observing a clearance distance.
This process continues until all cuts have been completed. An additional finishing cut to
smooth the thread is then performed and the start position for the thread is approached in
the longitudinal and transverse axes.
– Machining is now complete and the "Execute" screen can be closed with the "Cancel"
softkey.
– If you wish to continue machining the thread, e.g. if thread finishing is required, press
<CYCLE START> again.
Programming and Operating Manual, 12/2012, 6FC5398-3DP10-0BA0
Manual Machine Plus (Turning)