Vibrations, resonances, and oscillations can cause problems in a servo-motor application. But when you turn down the control-loop gains, the driven machine responds more slowly. So what do you do when the tuning gains that run the machine with fast settling time cause it to screech and oscillate out of control?

By Matt Pelletier and Bill Leang, Yaskawa America, Inc.

To correct oscillations in a machine, mechanical design improvements and electronic filters are typically employed. However, these solutions often deliver limited success. Engineers should consider adding anti-resonance control and vibration suppression to their quiver of solutions to correct such oscillation problems via the servo controller and amplifier system.

Read Full Article in Design News