n5-03: Feed Forward Control Gain

No. (Hex.)	Name	Description	Default (Range)
n5-03 (05B2)	Feed Forward Control Gain	Sets the ratio between load inertia and motor inertia. Inertia Tuning automatically sets the Feedforward Control Gain value.	1.00 (0.00 - 100.00)

When you cannot do Inertia Tuning, use this procedure to set n5-03:

Set n5-02 [Motor Inertia Acceleration Time].

1. Connect the motor and load.

2. Set C1-01 [Acceleration Time 1] = 0.

3. Use L7-01 to L7-04 [Torque Limit] to set the expected test run torque limit levels.

4. Set the frequency reference as specified by the high speed range of the machine.

5. Measure the length of time for the motor to reach the command reference speed.

   Show U1-05 [Motor Speed] on the keypad and enter the Run command.

6. Stop the motor.

7. Replace the values in the this formula and set n5-03 to the value of the formula.

   

   • t_accel = Acceleration time (s)

   • f_rated = Motor rated frequency (Hz)

   • T_{Lim_Test} = Test run torque limit (%)

   • f_{ref_Test} = Test run frequency reference (Hz)

Reset all of the parameters that you changed to the previous setting values.