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Advanced Auto-Tuning Capability

Fagor Automation has introduced a new technology feature that automatically fine-tunes machine servo performance to create maximum efficiency and performance from a CNC machine tool. Developed as a tool that can be loaded directly onto a Fagor 8065 or 8070 CNC or a PC, the Auto-Tuning feature has the ability to carry out a fine servo-performance tune one axis at a time or all axes automatically.

The program allows for multi-machine tuning, and thus utilizes an ICON directory for each machine for fast and easy machine selection. The main tuning screen displays a Graphic section, Menu bar, ICON bar, Axes bar, Command bar, Parameter Table, Monitoring area, Results area, Data information of all active commands and a Status bar. From the Main Menu, with the ICON keys, users can quickly jump to the Event Log, Configure Mode or Display Help mode or back to the Main Menu at any time.

During the tuning process, users can start, stop, pause or continue the tuning procedure via menu chosen keys. Within the Graphics mode, users can display the Bode frequency response diagrams that allow the user to interpret the dynamic behavior of the axes and make decisions for later readjustments of the axes control loops.

Within the Operating mode, the user takes measurements and develops a more detailed display of the various diagrams. The user may activate up to four channels or modify the scale shown.

From the Command bar, the user may choose the Auto-Tuning command that will execute the chosen tuning procedure. If desired, the user can choose to only adjust the feedback, the proportional gains, the offsets, just the servo gains or the velocity or position loop.

The Result label prompts a non-editable table that shows the parameter values the Auto-Tuning procedure results proposes to be changed for best performance. The table shows the original value of the parameters and the proposed value after the Auto-Tuning procedure has completed. The user has full control of which parameters are actually changed to the proposed value and those that remain with the initial default values.

In addition, the Results create an Information bar that displays the data regarding the cutoff frequency (BW), the gain margin (MG) or the phase margin (MF) of the Bode diagram before and after the Auto-Tuning, thus producing a helpful visual improvement chart for final decision making by the user.

After completion of the Auto-Tuning process, the user can then save all changes made with the Validate command.

"The Fagor Auto-Tuning feature has shown dramatic improvements in not just part finish, but also due to an optimized servo response that matches the dynamics of the machine tool size, weight and inertia, cycle speeds have also shown improvements," said a company spokesperson. "Machine reliability and longevity are also improved due to a servo system that provides more fluid machine movements, hence reducing mechanical stress."

For more information contact:


Todd Drane

Fagor Automation

800-423-2467 ext. 303


Joel Kasnik

Fagor Southeast operations

800-423-2467 ext. 302


Wayne Nelson

Fagor East Coast operations

800-423-2467 ext. 301


Art Gugulski (CNC)

800-423-2467 ext. 431

Alex Escamilla (DRO)

800-423-2467 ext. 436

Fagor US Headquarters


Jeffrey Lei

Fagor Automation

800-423-2467 ext. 106

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