Siemens SINUMERIK 828D Operating Manual page 491

If the workpiece programming requires it, you can display and change all of the parameters
using "Input complete".
Approach/retraction for vortex milling
1. The tool approaches the starting point in front of the slot in rapid traverse and maintains
the safety clearance.
2. The tool goes to the cutting depth.
3. The open slot is always machined along its entire length using the selected machining
method.
4. The tool retracts to the safety clearance in rapid traverse.
Approach/retraction for plunge cutting
1. The tool moves in rapid traverse to the starting point in front of the slot at the safety
clearance.
2. The open slot is always machined along its entire length using the selected machining
method.
3. The tool retracts to the safety clearance in rapid traverse.
Machining type, roughing vortex milling
Roughing is performed by moving the milling cutter along a circular path.
While performing this motion, the milling cutter is continuously fed into the plane. Once the
milling cutter has traveled along the entire slot, it returns to its starting point, while continuing
to move in a circular fashion. By doing this, it removes the next layer (infeed depth) in the Z
direction. This process is repeated until the set slot depth plus the finishing allowance has
been reached.
Vortex milling: Down-cut or up-cut
Turning
Operating Manual, 01/2015, 6FC5398-8CP40-5BA2
Programming technology functions (cycles)
Vortex milling: Down-cut-up-cut
9.4 Milling
491