Undercut Form E And F - Cycle940 - Siemens SINUMERIK 840D sl Operating Manual

4.5.4

Undercut form E and F - CYCLE940

Function
You can use the "Undercut form E" or "Undercut form F" cycle to turn form E or F undercuts
in accordance with DIN 509.
Approach/retraction
1. The tool first moves to the starting point calculated internally in the cycle at rapid traverse.
2. The undercut is made in one cut at the machining feedrate, starting from the flank
3. The tool moves back to the starting point at rapid traverse.
Procedure
HMI sl Turning
Operating Manual, 01/2008, 6FC5398-7AP10-0BA0
through to the cross-feed VX.
1. Select the part program to be edited in the "Program manager"
operating area.
2. Press the "Open" softkey or the "INPUT" key to edit the part program
in the editor.
3. Press the "Turning" softkey.
4. Press the "Undercut" softkey.
The "Undercut" input window opens.
5. Select one of the following undercut cycles via the softkeys:
Press the "Undercut form E" softkey.
The "Undercut form E (DIN 509)" input window opens.
- OR
Press the "Undercut form F" softkey.
The "Undercut form F (DIN 509)" input window opens.
Programming a cycle
4.5 Rotate
185