5.2 Motor Performance Fine TuningThis section offers helpful information for counteracting oscillation, hunting, or other faultsthat occur while performing a trial run.Note: This section describes parameters that are commonly edited. Consult Yaskawa for more information ondetailed settings and fine-tuning the drive.u Parameters for Tuning the DriveTable 5.1 Parameters for Tuning the DriveProblem Parameter No. Corrective Action DefaultValue SuggestedSetting• Motor hunting andoscillation at speedsbetween 10 and 40 HzHuntingPrevention Gain(n1-02)• If insufficient motor torque relative to thesize of the load causes hunting, reduce thesetting.• When motor hunting and oscillation occurwith a light load, increase the setting.• Lower this setting if hunting occurs whenusing a motor with a relatively lowinductance, such as a high-frequency motoror a motor with a larger frame size.1.00 0.10 to 2.00• Motor noise• Motor hunting andoscillation at speeds upto 40 HzCarrierFrequencySelection(C6-02)• If the motor noise is too loud, increase thecarrier frequency.• When motor hunting and oscillation occur atspeeds up to 40 Hz, lower the carrierfrequency.• The default setting for the carrier frequencydepends on the drive capacity (o2-04) and theDrive Duty Selection (C6-01).7 (SwingPWM) 1 to 7• Poor motor torque atspeeds below 10 Hz• Motor hunting andoscillationTorqueCompensationGain (C4-01)• If motor torque is insufficient at speedsbelow 10 Hz, increase the setting.• If motor hunting and oscillation with arelatively light load, decrease the setting.1.00 0.50 to 1.50• Poor motor torque atlow speeds• Motor instability atmotor startMid OutputVoltage A(E1-08)MinimumOutput Voltage(E1-10)• If torque is insufficient at speeds below 10Hz, increase the setting.• If motor instability occurs at motor start,decrease the setting.Note: The recommended setting value is for 200V class drives. Double this value when using a400 V class drive.E1-08:16.0 VE1-10:12.0 VInitial value±5 V• Poor speed precision SlipCompensationGain (C3-01)• After setting the motor-rated current (E2-01),motor-rated slip (E2-02) and motor no-loadcurrent (E2-03), adjust the slip compensationgain (C3-01).- 0.5 to 1.5u Motor Hunting and Oscillation Control ParametersThe following parameters indirectly affect motor hunting and oscillation.5.2 Motor Performance Fine TuningYASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual 1215 Troubleshooting
