Circular Spigot (Cycle77) - Siemens SINUMERIK Series Operating Manual

10.2.5

Circular spigot (CYCLE77)

Function
You can mill various circular spigots with the "Circular spigot" function.
In addition to the required circular spigot, you must also define a blank spigot, i.e. the outer
limits of the material. The tool moves at rapid traverse outside this area. The blank spigot must
not overlap adjacent blank spigots and is automatically placed on the finished spigot in a
centered position.
The circular spigot is machined using only one infeed. If you want to machine the spigot using
multiple infeeds, you must program the "Circular spigot" function several times with a reducing
finishing allowance.
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. The tool approaches the starting point at rapid traverse at the height of the retraction plane
and is fed in to the safety clearance. The starting point is always on the positive X axis.
2. The tool approaches the spigot contour sideways in a semicircle at machining feedrate.
The tool first executes infeed at machining depth and then moves in the plane. The circular
spigot is machined depending on the programmed machining direction (up-cut/down-cut)
in a clockwise or counterclockwise direction.
3. When the circular spigot has been traversed once, the tool retracts from the contour in a
semicircle and then infeed to the next machining depth is performed.
4. The circular spigot is approached again in a semicircle and traversed once. This process
is repeated until the programmed spigot depth is reached.
5. The tool moves back to the safety clearance at rapid traverse.
Milling
Operating Manual, 08/2018, 6FC5398-7CP41-0BA0
Machine manufacturer
Please refer to the machine manufacturer's specifications.
Machine manufacturer
Various defined values can be pre-assigned using setting data.
Please refer to the machine manufacturer's specifications.
Programming technological functions (cycles)
10.2 Milling
441