Siemens SINUMERIK 828D Operating Manual page 817

Parameter
The parameters of the input screen forms correspond to the parameters under Automatic
(see Section "Rotate (Page 355)").
Thread cutting
In addition to the functions that are made available by "thread-cutting" under Automatic, you
can insert idle cuts during the machining process under "Manual Machine."
You can interrupt the infeed of the cutting depth during the machining process by inserting
idle cuts, in order to smooth the flanks for example.
Thread re-machining
You can re-machine existing threads, when repairing previously cut threads for example or
as the result of changes that arise from re-measuring (see Section "Thread synchronizing
(Page 120)").
If you want to rework some threads, input the initial plunge depth D0 (inc.). This is the depth
that was reached during a previous machining.
Note
By inputting the plunge depth, you avoid unnecessary idle cuts when reworking the threads.
B axis
Turning
Operating Manual, 01/2015, 6FC5398-8CP40-5BA2
You can insert idle cuts using the "Idle cut" softkey.
This softkey is only active during machining.
Working with Manual Machine
15.6 More complex machining
817