Siemens SINUMERIK 840D sl Operating Manual page 344

Programming technological functions (cycles)
8.2 Milling
Machining type: Helical
When milling circular pockets, you can select the following machining types:
● Roughing
● Finishing
● Edge finishing
Procedure
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During roughing, the circular pocket is machined downward with helical movements.
A full circle is effected down to pocket depth to remove the residual material.
The tool is retracted from the edge and base of the pocket in a quadrant and retracted
with rapid traverse to a safety clearance.
This process is repeated layer-by-layer, from inside out, until the circular pocket has been
completely machined.
In finishing mode, the edge is machined first with a helical movement down to the bottom.
A full circle is effected down to pocket depth to remove the residual material.
The base is milled from outside in a spiral movement.
The tool is retracted from the center of the pocket to a safety clearance.
In edge finishing, the edge is machined first with a helical movement down to the bottom.
A full circle is effected down to pocket depth to remove the residual material.
The tool is retracted from the edge and base of the pocket in a quadrant and retracted
with rapid traverse to a safety clearance.
1. The part program or ShopMill program to be processed has been
created and you are in the editor.
2. Press the "Milling" softkey.
3. Press the "Pocket" and "Circular pocket" softkeys.
The "Circular Pocket" input window opens.
Operating Manual, 03/2013, 6FC5398-7CP40-3BA1
Milling