Siemens SINUMERIK 828D Operating Manual page 436

Programming technology functions (cycles)
9.4 Milling
If the workpiece programming requires it, you can display and change all of the parameters
using "Input complete".
Approach/retraction
1. The tool approaches the center point of the rectangular pocket in rapid traverse at the
height of the retraction plane and adjusts to the safety clearance.
2. The tool is inserted into the material according to the chosen strategy.
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.
436
Machine manufacturer
Various defined values can be pre-assigned using setting data.
Please refer to the machine manufacturer's specifications.
Operating Manual, 01/2015, 6FC5398-8CP40-5BA2
Turning