Milling Contour Spigots (Roughing) - Siemens SINUMERIK 840D Operation/Programming Manual

3
Programming with ShopMill
3.5 Contour milling

3.5.12 Milling contour spigots (roughing)

Approach/retraction
3-216
Use the "Mill spigot" function if you want to mill any kind of spigot.
Before you mill the spigot, you must first enter a blank contour and
then one or more spigot contours. The blank contour defines the outer
limits of the material. The tool moves at rapid traverse outside this
area. Material is then removed between the blank contour and spigot
contour.
You can select the machining mode (roughing or finishing) for milling.
If you want to rough and then finish, you have to call the machining
cycle twice (Block 1 = roughing, Block 2 = finishing). The
programmed parameters are retained on the second call. For more on
finishing, see Sec. "Finishing the contour spigot".
If you only program a blank contour without a second contour for a
spigot, you can face mill the blank contour.
1. The tool approaches the starting point at rapid traverse at the
height of the retraction plane and adjusts to the safety clearance.
The start point is calculated by ShopMill.
2. The tool first infeeds to the machining depth and then approaches
the spigot contour from the side in a quadrant at machining
feedrate.
3. The spigot is cleared in parallel with the contours from the outside
in. The direction is determined by the machining direction
(climb/conventional) (see "Creating a new program; defining a
blank").
4. When the first plane of the spigot has been cleared, the tool
retracts from the contour in a quadrant and then infeeds to the next
machining depth.
5. The spigot is again approached in a quadrant and cleared in
parallel with the contours from outside in.
6. Steps 4 and 5 are repeated until the programmed spigot depth is
reached.
7. The tool moves back to the safety clearance at rapid traverse.
Press the "Cont. mill." and "Mill spigot" softkeys.
Mill
spigot >
Select "Roughing" machining mode.
SINUMERIK 840D/840Di/810D Operation/Programming ShopMill (BAS) – 10.04 Edition
3
10.04
 Siemens AG, 2004. All rights reserved