Siemens SINUMERIK 840D sl Operating Manual page 405

Approach/retraction
1. The tool approaches the center point of the slot at rapid traverse at the height of the
2. The tool is inserted into the material according to the method selected.
3. The longitudinal slot is always machined from inside out using the selected machining
4. The tool moves back to the safety distance at rapid traverse.
Machining type
You can select any of the following machining types for milling the longitudinal slot:
● Roughing
● Finishing
● Edge finishing
● Chamfering
Turning
Operating Manual, 03/2013, 6FC5398-8CP40-3BA1
retraction plane and adjusts to the safety distance.
method.
Roughing involves machining the individual planes of the slot one after the other from the
inside out, until depth Z1 or X1 is reached.
During finishing, the edge is always machined first. The slot edge is approached on the
quadrant that joins the corner radius. During the last infeed, the base is finished from the
center out.
Edge finishing is performed in the same way as finishing, except that the last infeed
(finish base) is omitted.
Chamfering involves edge breaking at the upper edge of the longitudinal slot.
SC
Figure 8-3 Geometries when chamfering inside contours
Programming technology functions (cycles)
SC
ZFS
8.4 Milling
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