Siemens SINUMERIK 840D sl Turning Operating Manual page 508

Programming technology functions (cycles)
10.4 Milling
Approach/retraction
1. The tool approaches the starting point at rapid traverse at the height of the retraction plane
and adjusts to the safety distance. The starting point is on the positive X axis rotated through
α0.
2. The tool traverses the spigot contour sideways in a semicircle at the machining feedrate.
The tool first executes the infeed at machining depth, followed by the movement in the
plane. Depending on the machining direction that has been programmed (up-cut/
synchronism), the spigot is machined in a clockwise or counterclockwise direction.
3. When the spigot has been circumnavigated once, the tool is removed from the contour in a
semicircle; the infeed to the next machining depth is then executed.
4. The spigot is approached again in a semicircle and circumnavigated once. This process is
repeated until the programmed spigot depth is reached.
5. The tool moves back to the safety distance at rapid traverse.
Machining type
● Roughing
Roughing involves moving around the rectangular spigot until the programmed finishing
allowance has been reached.
● Finishing
If you have programmed a finishing allowance, the rectangular spigot is moved around until
depth Z1 is reached.
● Chamfering
Chamfering involves edge breaking at the upper edge of the rectangular spigot.
Procedure
508
1. The part program or ShopTurn program to be processed has been cre‐
ated and you are in the editor.
2. Press the "Milling" softkey.
3. Press the "Multi-edge spigot" and "Rectangular spigot" softkeys.
The "Rectangular Spigot" input window opens.
Operating Manual, 06/2019, A5E44903486B AB
Turning