Siemens SINUMERIK 840D sl Operating Manual page 244

Creating a ShopTurn program
9.4 Fundamentals
Approach/retraction sequence in a machining cycle
Figure 9-5
● The tool traverses in rapid traverse along the shortest path from the tool change point to
the retraction plane, which runs parallel to the machining plane.
● After this, the tool traverses in rapid traverse to the safety clearance.
● Following this, the workpiece is then machined with the programmed machining feedrate.
● After machining, the tool retracts with rapid traverse to the safety clearance.
● The tool then continues to traverse vertically in rapid traverse to the retraction plane.
● From there, the tool traverses in rapid traverse along the shortest path to the tool change
point. If the tool does not need to be changed between two machining processes, the tool
traverses from the retraction plane to the next machining cycle.
The spindle (main, tool, or counter-spindle) begins to rotate immediately after the tool change.
You define the tool change point, the retraction plane, and the safety clearance in the program
header.
Taking into account the tailstock
Figure 9-6
● The tool traverses in rapid traverse from the tool change point along the shortest path to
the retraction plane XRR from the tailstock.
● After this, the tool traverses in rapid traverse on the retraction plane in the X direction.
244
Machining cycle, approach/retraction
Approach/retraction taking into account the tailstock
Operating Manual, 05/2017, A5E40868721
Turning