Circular Spigot - Cycle77 - Siemens SINUMERIK 840D sl Operating Manual

Parameter
UXY
UZ
W1
L1
1) Parameter description refers to plane G17; plane selection G18 or G19 possible in selection field
(MD 52005: $MCS_DISP_PLANE_MILL)!
4.7.5

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.
Machining type
You can select the machining mode for milling the circular spigot as follows:
● Roughing
● Finishing
● Chamfering
HMI sl Turning
Operating Manual, 01/2008, 6FC5398-7AP10-0BA0
Description
Plane finishing allowance for the length (L) and width (W) of the rectangular spigot.
Smaller rectangular spigot dimensions are obtained by calling the cycle again and
programming it with a lower finishing allowance. - (only for ∇ and ∇∇∇)
Depth finishing allowance (tool axis) - (only for ∇ and ∇∇∇)
Width of blank spigot (important for determining approach position) - (only for ∇
and ∇∇∇)
Length of blank spigot (important for determining approach position) - (only for ∇
and ∇∇∇)
Roughing involves moving round the circular spigot until the programmed finishing
allowance has been reached.
If you have programmed a finishing allowance, the circular spigot is moved around until
depth Z1 is reached.
Chamfering involves edge breaking at the upper edge of the circular spigot.
Programming a cycle
4.7 Milling
Unit
mm
mm
mm
mm
231