Siemens SINUMERIK 840D sl Operating Manual page 401

Approach/retraction
1. The tool approaches the starting point at rapid traverse at the height of the retraction
2. The tool traverses the spigot contour sideways in a semicircle at the machining feedrate.
3. When the spigot has been circumnavigated once, the tool is removed from the contour in
4. The spigot is approached again in a semicircle and circumnavigated once. This process
5. The tool moves back to the safety distance at rapid traverse.
Machining type
● Roughing
● Finishing
● Chamfering
Procedure
Turning
Operating Manual, 02/2012, 6FC5398-8CP40-3BA0
plane and adjusts to the safety distance. The starting point is on the positive X axis
rotated through α0.
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.
a semicircle; the infeed to the next machining depth is then executed.
is repeated until the programmed spigot depth is reached.
Roughing involves moving around the rectangular spigot until the programmed finishing
allowance has been reached.
If you have programmed a finishing allowance, the rectangular spigot is moved around
until depth Z1 is reached.
Chamfering involves edge breaking at the upper edge of the rectangular spigot.
1. The part program or ShopTurn program to be processed has been
created 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.
Programming technology functions (cycles)
8.4 Milling
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