Siemens SINUMERIK 840D sl Operating Manual page 413

Machining method
● Roughing
If the tool does not round the corner at the end of the cut, it is raised by the safety distance
or a value specified in the machine data at rapid traverse. The cycle always observes the
lower value; otherwise, stock removal at inner contours, for example, could cause the
contour to be damaged.
● Finishing
Procedure
Milling
Operating Manual, 03/2013, 6FC5398-7CP40-3BA1
In roughing applications, paraxial cuts are machined to the finishing allowance that has
been programmed. If no finishing allowance has been programmed, the workpiece is
roughed down to the final contour.
During roughing, the cycle reduces the programmed infeed depth D if necessary so that it
is possible for cuts of an equal size to be made. For example, if the overall infeed depth is
10 and you have specified an infeed depth of 3, this would result in cuts of 3, 3, 3 and 1.
The cycle would reduce the infeed depth to 2.5 to create 4 equally sized cuts.
The angle between the contour and the tool cutting edge determines whether the tool
rounds the contour at the end of each cut by the infeed depth D, in order to remove
residual corners, or is raised immediately. The angle beyond which rounding is performed
is stored in a machine data element.
Machine manufacturer
Please also refer to the machine manufacturer's instructions.
Machine manufacturer
Please also refer to the machine manufacturer's instructions.
Finishing is performed in the same direction as roughing. The cycle automatically selects
and deselects tool radius compensation during finishing.
1. The part program to be processed has been created and you are in the
editor.
2. Press the "Turning" softkey.
3. Press the "Stock removal" softkey.
The "Stock Removal" input window opens.
4. Select one of the three stock removal cycles via the softkeys:
Simple straight stock removal cycle.
The "Stock removal 1" input window opens.
- OR -
Programming technological functions (cycles)
8.4 Turning - only for G code programs
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