Undercut Form E And F (Cycle940); Function - Siemens SINUMERIK 840D sl Operating Manual

Programming technological functions (cycles)
8.4 Turning - only for G code programs
8.4.4

Undercut form E and F (CYCLE940)

8.4.4.1

Function

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
Parameters, G code program (undercut, form E)
PL Machining plane
SC Safety clearance
F Feedrate
422
through to the cross-feed VX.
1. The part program or ShopMill program to be processed has been
created and you are in the editor.
2. Press the "Turning" softkey.
3. Press the "Undercut" softkey.
The "Undercut" input window opens.
4. 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.
mm
*
T
D Cutting edge number
F Feedrate
S / V Spindle speed or
Constant cutting rate
Operating Manual, 03/2013, 6FC5398-7CP40-3BA1
mm/min
mm/rev
rpm
m/min
Milling