Siemens SINUMERIK 840D sl Operating Manual page 404

Programming technological functions (cycles)
8.4 Turning - only for G code programs
Approach/retraction
1. The tool first moves to the starting point calculated internally in the cycle at rapid traverse.
2. The chamfer or radius is machined at the machining feedrate.
3. Cut-off down to depth X1 is performed at the machining feedrate.
4. Cut-off is continued down to depth X2 at reduced feedrate FR and reduced speed SR.
5. The tool moves back to the safety distance at rapid traverse.
If your turning machine is appropriately set up, you can extend a workpiece drawer (part
catcher) to accept the cut-off workpiece. Extension of the workpiece drawer must be enabled
in a machine data element.
Procedure
Parameters, G code program
PL Machining plane
SC Safety clearance
F Feedrate
Parameter
DIR
S
V
SV
X0
Z0
404
Machine manufacturer
Please refer to the machine manufacturer's specifications.
1. The part program to be executed has been created and you are in the
editor.
2. Press the "Turning" softkey.
3. Press the "Cut-off" softkey.
The "Cut-off" input window opens.
mm
*
Description
Direction of spindle rotation
Spindle speed
Constant cutting rate
Maximum speed limit - (only for constant cutting rate V)
Reference point in X ∅ (abs, always diameter)
Reference point in Z (abs)
Operating Manual, 09/2011, 6FC5398-7CP40-2BA0
Unit
rev/min
mm/min
rev/min
mm
mm
Milling