Siemens SINUMERIK 840D sl Operating Manual page 358

Programming technology functions (cycles)
8.3 Contour turning
For single-channel systems, cycles do not extend the name for the programs to be
generated.
Note
G code programs
For G code programs, the programs to be generated, which do not include any path data,
are saved in the directory in which the main program is located. In this case, it must be
ensured that programs, which already exist in the directory and which have the same name
as the programs to be generated, are overwritten.
Machining type
You can select the machining mode (roughing or finishing). During contour roughing, parallel
cuts of maximum programmed infeed depth are created. Roughing is performed to the
programmed allowance.
You can also specify a compensation allowance U1 for finishing operations, which allows
you to either finish several times (positive allowance) or to shrink the contour (negative
allowance). Finishing is performed in the same direction as roughing.
Procedure
358
1. The part program or ShopTurn program to be processed has been
created and you are in the editor.
2. Press the "Contour turning" softkey.
3. Press the "Stock removal" softkey.
The "Stock Removal" input window opens.
Operating Manual, 03/2013, 6FC5398-8CP40-3BA1
Turning