Siemens SINUMERIK 840D sl Turning Operating Manual page 534

Programming technology functions (cycles)
10.4 Milling
Tool size
Please note that there is a minimum size for the milling cutter used to machine the
circumferential slot:
● Roughing:
1⁄2 groove width W – finishing allowance UXY ≤ milling cutter diameter
● Finishing:
1⁄2 groove width W ≤ milling cutter diameter
● Edge finishing:
Finishing allowance UXY ≤ milling cutter diameter
Annular groove
To create an annular groove, you must enter the following values for the "Number N" and
"Aperture angle α1" parameters:
N = 1
α1 = 360°
Input simple
For simple machining operations, you have the option to reduce the wide variety of parameters
to the most important parameters using the "Input" selection field. In this "Input simple" mode,
the hidden parameters are allocated a fixed value that cannot be adjusted.
If the workpiece programming requires it, you can display and change all of the parameters
using "Input complete".
Approach/retraction
1. At the height of the retraction plane, the tool approaches the center point of the semicircle
at the end of the groove at rapid traverse and adjusts to the safety distance.
2. It is then inserted into the workpiece at the machining feedrate, allowing for the maximum
Z direction infeed (for face machining), X direction infeed (for peripheral machining), and the
finishing allowance. Depending on the machining direction (up-cut or down-cut), the
circumferential groove is machined in a clockwise or counterclockwise direction.
3. When the first circumferential groove is finished, the tool moves to the retraction plane at
rapid traverse.
4. The next circumferential groove is approached along a straight line or circular path and then
machined.
5. The rapid traverse feedrate for positioning on a circular path is specified in a machine data
element.
534
Machine manufacturer
Various defined values can be pre-assigned using setting data.
Please refer to the machine manufacturer's specifications.
Operating Manual, 06/2019, A5E44903486B AB
Turning