Siemens SINUMERIK 840D sl Operating Manual page 261

Approach/retraction strategy
You can choose between planar approach/retraction and spatial approach/retraction:
● Planar approach:
● Spatial approach:
● Retraction is performed in reverse order.
Path milling along center-point path.
A programmed contour can also be machined along the center-point path if the operation
has been activated under radius compensation. In this case, approaching and retraction is
only possible along a straight line or vertical. Vertical approach/retraction can be used for
closed contours, for example.
Machining type
You can select the machining mode (roughing, finishing, or chamfer) for path milling. If you
want to "rough" and then "finish", you have to call the machining cycle twice (Block 1 =
roughing, Block 2 = finishing). The programmed parameters are retained when the cycle is
called for the second time.
It is also possible to choose between machining the contour with a cutter radius offset or
traversing on the center-point path.
Procedure
HMI sl Turning
Operating Manual, 01/2008, 6FC5398-7AP10-0BA0
Approach is first at depth and then in the machining plane.
Approach is at depth and in machining plane simultaneously.
Mixed programming is possible, for example, approach in the machining plane, retract
spatially.
1. Select the part program to be edited in the "Program manager"
operating area.
2. Press the "Open" softkey or the "INPUT" key to edit the part program
in the editor.
3. Press the "Milling" softkey.
4. Press the "Contour milling" and "Path milling" softkeys.
The "Path Milling" input window opens.
Programming a cycle
4.8 Contour milling
261