Circular Spigot - Siemens SINUMERIK 840D Operation/Programming Manual

3
10.04

3.8.5 Circular spigot

Approach/retraction
 Siemens AG, 2004. All rights reserved
SINUMERIK 840D/840Di/810D Operation/Programming ShopMill (BAS) – 10.04 Edition
The "Circular spigot" function is used when you want to mill a circular
spigot.
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 placed by ShopMill automatically on the finished
spigot in a centered position.
The 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.
1. The tool approaches the starting point at rapid traverse at the
height of the retraction plane and adjusts to the safety clearance.
The starting point is always on the positive X axis.
2. The tool traverses the spigot contour sideways in a semicircle at
machining feed. The tool first executes infeed at machining depth
and then moves in the plane. The spigot is machined as a function
of the programmed machining direction (climb/conventional) in a
clockwise or counterclockwise direction.
3. When the spigot has been circumnavigated once, the tool retracts
from the contour in the plane in a semicircle and then infeeds to
the next machining depth.
4. The spigot is approached again in a semicircle and
circumnavigated once. It repeats the process until the spigot depth
has been reached.
5. The tool moves back to the safety clearance at rapid traverse.
Programming with ShopMill
3.8 Milling
3
3-275