Siemens SINUMERIK 840D sl Operating Manual page 367

When set to "automatic", rounding is always performed if the angle between the cutting edge
and the contour exceeds a certain value. The angle is set in a machine data element.
Alternating cutting depth
Instead of working with constant cutting depth D, you can use an alternating cutting depth to
vary the load on the tool edge, As a consequence you can increase the tool life.
The percentage for the alternating cutting depth is saved in a machine data element.
Cut segmentation
To avoid the occurrence of very thin cuts in cut segmentation due to contour edges, you can
align the cut segmentation to the contour edges. During machining the contour is then
divided by the edges into individual sections and cut segmentation is performed separately
for each section.
Set machining area limits
If, for example, you want to machine a certain area of the contour with a different tool, you
can set machining area limits so that machining only takes place in the area of the contour
you have selected. You can define between 1 and 4 limit lines.
Feedrate interruption
To prevent the occurrence of excessively long chips during machining, you can program a
feedrate interruption. Parameter DI specifies the distance after which the feedrate
interruption should occur.
Turning
Operating Manual, 02/2012, 6FC5398-8CP40-3BA0
Machine manufacturer
Please refer to the machine manufacturer's specifications.
Machine manufacturer
Please refer to the machine manufacturer's specifications.
Programming technology functions (cycles)
8.3 Contour turning
367