Siemens SINUMERIK 840D sl Turning Operating Manual page 407

If the tool does not round the corner at the end of the cut, it is raised by the safety clearance or
a value specified in the machine data with rapid traverse. The cycle always observes the lower
value; otherwise, stock removal at inner contours, for example, could cause the contour to be
damaged.
● Finishing
Finishing is performed in the same direction as roughing. The cycle automatically selects
and deselects tool radius compensation during finishing.
Approach/retraction
1. The tool first moves at rapid traverse to the starting point of the machining operation
calculated internally in the cycle (reference point + safety distance).
2. The tool moves to the first infeed depth at rapid traverse.
3. The first cut is made at machining feedrate.
4. The tool rounds the contour at machining feedrate or is raised at rapid traverse (see
"Roughing").
5. The tool is moved at rapid traverse to the starting point for the next infeed depth.
6. The next cut is made at machining feedrate.
7. Steps 4 to 6 are repeated until the final depth is reached.
8. The tool moves back to the safety distance at rapid traverse.
Procedure
Turning
Operating Manual, 06/2019, A5E44903486B AB
Machine manufacturer
Please observe the information provided by the machine manufacturer.
1. The part program or ShopTurn program to be processed has been cre‐
ated and you are in the editor.
2. Press the "Turning" softkey.
3. Press the "Stock removal" softkey.
The "Stock Removal" input window opens.
4. Select one of the three stock removal cycles via the softkeys:
Simple straight stock removal cycle.
The "Stock removal 1" input window opens.
- OR
Straight stock removal cycle with radii or chamfers.
The "Stock removal 2" input window opens.
- OR
Stock removal cycle with oblique lines, radii, or chamfers.
The "Stock Removal 3" input window opens.
Programming technology functions (cycles)
10.2 Rotate
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