Siemens SINUMERIK 840D sl Turning Operating Manual page 490

Programming technology functions (cycles)
10.4 Milling
3. The rectangular pocket is always machined with the chosen machining type from inside out.
4. The tool moves back to the safety clearance at rapid traverse.
Machining type
● Roughing
Roughing involves machining the individual planes of the pocket one after the other from the
center out, until depth Z1 or X1 is reached.
● Finishing
During finishing, the edge is always machined first. The pocket 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
Edge finishing is performed in the same way as finishing, except that the last infeed (finish
base) is omitted.
● Chamfering
Chamfering involves edge breaking at the upper edge of the rectangular pocket.
Figure 10-13
Note
The following error messages can occur when chamfering inside contours:
● Safety clearance in the program header too large
● Immersion depth too large
● Tool diameter too large
490
Geometries when chamfering inside contours
This error message appears when chamfering would, in principle, be possible with the
parameters entered for FS and ZFS, but the safety clearance then could not be
maintained.
This error message appears when chamfering would be possible through the reduction
of the immersion depth ZFS.
This error message appears when the tool would already damage the edges during
insertion. In this case, the chamfer FS must be reduced.
Operating Manual, 06/2019, A5E44903486B AB
Turning