Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

9 Adjustments9.4.10 Torque Reference Filter9.4.10 Torque Reference FilterAs shown in the following diagram, the torque reference filter contains torque reference filter time constant(Pn401) and notch filter frequency (Pn409) arrayed in series. The notch filter can be enabled and disabled usingthe parameters.TorquefunctionswitchesPn408Torque referencebefore filteringTorque referencefilter timeconstantPn401NotchfilterfrequencyPn409Torque referenceafter filtering1st-order delay filterNotch filter(1) Torque Reference FilterIf you suspect that machine vibration is being caused by the servodrive, try adjusting the filter time constant. Thismay stop the vibration. The lower the value, the better the speed control response will be, but there is a lowerlimit that depends on the machine conditions.Pn401Torque Reference Filter Time ConstantSpeed Position TorqueSetting Range Setting Unit Factory Setting Setting Validation0 to 65,535(0.00 to 655.35 ms)0.01 ms 100 Immediately(2) Notch FilterUsing the notch filter in accordance with the components of specific vibration frequency such as resonances ofball screw can eliminate the frequency components to stop the vibration.ParameterMeaningPn408 n.0 Disables the notch filter.n.1 Enables the notch filter.Enables the notch filter to be used. (The setting is validated immediately.)Set the machine’s vibration frequency in the parameter of a notch filter to be used.Pn409Notch Filter FrequencySpeed Position TorqueSetting Range Setting Unit Factory Setting Setting Validation50 to 2,000 Hz Hz 2,000 Immediately9-26