How NUMgrind Expands Precision, Integration and Strategic Flexibility

Grinding applications are becoming more dynamic. Complex contours, tighter tolerances and automated production environments are redefining what modern CNC systems must deliver. For machine builders, this means scalable integration and shorter development cycles. For manufacturers, it means stable processes and predictable quality.

With the latest NUMgrind enhancements, NUM strengthens both perspectives. The new functions are not isolated upgrades. They form a coherent performance architecture fully embedded in the Flexium+ CNC platform.

Fully Integrated Non-Circular Grinding - Dynamic Control Built into the CNC Core
Non-circular grinding requires continuous synchronization between axes under highly dynamic conditions. The grinding wheel must adapt in real time to the rotating workpiece while maintaining contour precision and surface quality.

In NUMgrind, the non-circular grinding cyles are built on CNC functions that are fully integrated into the CNC kernel. Interpolation, drive control and speed regulation operate within one unified system. There is no external motion layer and no additional complexity.

For OEMs, this means simplified system design and reliable scalability.
For end users, it means smooth motion profiles, stable contact conditions and consistent machining results.

New grinding strategies such as Oscillating Plunge, Oscillating Multiplunge, Shoulder Plunge as well as Oscillating Shoulder enable new ways of grinding the workpiece. (Picture 1)

The same logic applies to internal non-circular grinding, with profile import in Cartesian or polar coordinates and consistent cycle structure across OD and ID applications. (Picture 2)
Dynamic motion becomes structured engineering.

Intelligent In-Cycle Dressing in Non-Circular Grinding- Stability Without Interruption
Dressing is no longer treated as a separate manual step in non-circular grinding. NUMgrind now allows operators to request dressing directly within the cycle. It is moved cleanly away from the workpiece, dressing is performed and corrections are reactivated before non-circular grinding resumes at the exact position.

The process continues without manual interruption.
For machine builders, this integrated logic reduces application risk.
For operators, it increases confidence and process reliability.

Strategic Dressing Flexibility - Multiple Units, One System Architecture
NUMgrind supports six fully integrated dressing unit types, including fixed diamond systems and form dressing rollers for conventional and CBN wheels. Guided setup pages and application-specific cycles simplify commissioning and reduce configuration errors. (Picture 3)

Automatic spindle speed calculation ensures consistent dressing conditions based on disc diameter and speed ratio for the form and profile dressing roller, within the set limits of the allowed rpm.

The new “Secondary Dressing Unit” concept adds strategic flexibility. A second active dresser can be defined and selectively assigned at any place where dressing or shaping can be selected. Selection rules prevent configuration conflicts.

This makes it possible, for example, to dress the grinding wheel at different dressing stations between the process steps “roughing” and “finishing. ”If one unit is unavailable, the system automatically checks the alternative. (Picture 4)

For OEMs, this means modular flexibility in machine designs.
For end users, it means more flexibility in where to dress the wheel.

Geometric Control at the Wheel Relief
Grinding performance begins at the wheel. NUMgrind now supports three configurable relief end geometries, including angle, angle with fillet and circular transitions.

Parameters such as relief end angle β and fillet radius can be defined independently for left and right wheel sides. What was once a fixed geometry is now a controlled design parameter. (Picture 5)

Wheel geometry becomes part of the performance strategy. (Picture 5)

Transparency and Operational Clarity
The new Production Page of NUMgrind provides a centralized overview of active cycle status, In-Cycle information, program version and grinding wheel parameters.

Furthermore, the setup page has been redesigned so that all spindle data is grouped together and all dressing data can be found in one place.

In addition, Flexium+ HMI version 04.02.20.00 and higher allows entire commands and tools to be copied in the FXCAM.

This is a huge relief for machine operators when they have, for example, a camshaft with 8 cams. They can then fill in all the grinding parameters for the first cam in the command and then copy this completed command seven times, leaving only the grinding positions to be adjusted. (Picture 6)

For OEMs, this enhances usability and machine differentiation.
For operators, it delivers immediate process clarity.

Engineering Productivity in Grinding
The latest NUMgrind release demonstrates how integrated CNC intelligence creates value across the entire grinding lifecycle.

Machine builders benefit from scalable architecture and reduced engineering effort.
Manufacturers gain stability, transparency and strategic flexibility in production.
Grinding becomes more precise.

Dressing becomes more intelligent.
Operation becomes more predictable.

NUM continues to translate advanced CNC technology into measurable productivity.