CNC Software Compensates for Axis Nodding

Siemens is releasing new functions with its Sinumerik 4.8 CNC software, designed to significantly improve the speed, precision and safety of machine tools. The new system compensates for unwanted axis nodding movements and protects against machine, tool and workpiece collisions. Nodding compensation (NoCo) is used to compensate for dynamic position deviations in one or more linear machine axes caused by acceleration processes. These position deviations are caused by what is known as mechanical compliance within the machine.

NoCo compensates for the dominant position deviation by initiating a corrective movement in the relevant machine axis for improved machining quality with higher jerk and acceleration values. Nodding compensation can be used in conjunction with any technology, such as milling, tapping, laser machining or waterjet machining. NoCo is available in two variants: the Eco variant for dominant acceleration effects in which the compensation axis is combined with one influencing variable, or the Advanced variant, which manages several influencing variables.

The software also comes with either Collision Avoidance Eco or Collision Avoidance Advanced. The Eco version provides simple, reliable machine protection by preventing collisions of the machine body with its own components in the work area. To achieve this effect in real time, the assemblies that need protection are calculated as simple geometric bodies. This collision monitoring system is available in all three operating modes. The company says the program can efficiently engineer and visualize the protected areas as a 3D image at the control interface. The Advanced variant includes full machine, tool and workpiece protection. The ModuleWorks software runs via an interface on an external PC and works together with the CNC to continuously monitor and protect the machine, tool and workpiece during the stock removal process. The workpiece and tool data required is available to the system during setup.