Siemens SINUMERIK 840D sl Operating Manual page 419

Machining type, finishing:
When finishing walls, the milling cutter travels along the slot walls, whereby just like for
roughing, it is again fed in the Z direction, increment by increment. During this process, the
milling cutter travels through the safety clearance beyond the beginning and end of the slot,
so that an even slot wall surface can be guaranteed across the entire length of the slot.
Machining type, edge finishing
Edge finishing is performed in the same way as finishing, except that the last infeed (finish
base) is omitted.
Machining type, finishing base:
When finishing the base, the milling cutter moves backwards and forwards once in the
finished slot.
Machining type, chamfering
Chamfering involves breaking the edge at the upper slot edge.
Figure 8-5
Turning
Operating Manual, 03/2013, 6FC5398-8CP40-3BA1
SC
ZFS
Geometries when chamfering inside contours
Programming technology functions (cycles)
SC
8.4 Milling
419