Programming technology functions (cycles)8.2 RotateTurningOperating Manual, 02/2012, 6FC5398-8CP40-3BA0 3498.2.8 Cut-off (CYCLE92)FunctionThe "Cut-off" cycle is used when you want to cut off dynamically balanced parts (e.g. screws,bolts, or pipes).You can program a chamfer or rounding on the edge of the machined part. You can machineat a constant cutting rate V or speed S up to a depth X1, from which point the workpiece ismachined at a constant speed. As of depth X1, you can also program a reduced feedrate FRor a reduced speed SR, in order to adapt the velocity to the smaller diameter.Use parameter X2 to enter the final depth that you wish to reach with the cut-off. With pipes,for example, you do not need to cut-off until you reach the center; cutting off slightly morethan the wall thickness of the pipe is sufficient.Approach/retraction1. 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 (partcatcher) to accept the cut-off workpiece. Extension of the workpiece drawer must be enabledin a machine data element.Machine manufacturerPlease refer to the machine manufacturer's specifications.
