Siemens sinumerik 840D sl Operating Manual page 418

Programming technology functions (cycles)
8.6 Further cycles and functions
● Direction "-" (minus)
● Direction "+" (plus)
The two "Minus" or "Plus" direction settings enable a workpiece to be machined with
swiveled planes. The two solutions calculated by the NC differ by 180 degrees (see rotary
axis C).
Tool
To avoid collisions, you can use the 5-axis transformation (software option) to define the
position of the tool tip during swiveling.
● Correct
● No correction
Procedure
418
– Rotary axis B moves to -10 degrees in the negative direction (red arrow).
– Rotary axis C moves to 90 degrees (rotation around X!).
– Rotary axis B moves to +10 degrees in the positive direction (red arrow).
– Rotary axis C moves to 270 degrees.
The position of the tool tip is corrected during swiveling (tracking function).
The position of the tool tip is not corrected during swiveling.
Machine manufacturer
Please refer to the machine manufacturer's specifications.
1. The part program or ShopTurn program to be processed has been
created and you are in the editor.
2. Select the "Miscellaneous" softkey.
3. Press the "Swivel plane" softkey.
The "Swivel plane" input window opens.
4. Press the "Initial position" if you wish to reestablish the basic setting,
i.e. you wish to set the values back to 0.
This is done, for example, to swivel the coordinate system back to its
original orientation.
Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
Turning