FATEK SD3 Series, Instruction Manual, Page: 194 / 396

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5. Setting Parameters
SD3 Series Instruction Manual
5. Parameters
No. 102.0
Tuning:
Inertia ratio
Range Default Characteristics
100 to 10,000
250
[%]
Function
Use
Specify the ratio of the device load inertia to motor rotor inertia (moment of inertia).
Inertia Ratio =
=
Load I Rotor Inertia
Rotor Inertia
× 100%
Inertia ratio is estimated by auto-tuning. When estimation is difficult (for example, too large an inertia ratio
or too large a torque value), you can enter a calculated value of load inertia.
If vibration occurs after deceleration or acceleration, increase the inertia ratio.
Remark The inertia ratio being too large or too small will cause noise.
No. 103.0
Tuning:
Damping ratio
Range Default Characteristics
100 to 5,000
100
[%]
Function
Use
This parameter can be used for tuning to improve poor settling due to viscous friction,
or too large an inertia ratio.
Increasing (or decreasing) this parameter value in event of overshoot (or undershoot respectively)
may make the settling time shorter.
The value of this parameter is estimated along with inertia ratio simultaneously if Tuning: Items
(No.110.1) = 2 (start).
Prerequisite Position Control Mode, Velocity Control Mode
Related To No.110.1
No. 106.0
Tuning:
Inertia ratio upper bound
Range Default Characteristics
100 to 10,000
3,000
[%]
Function
Use
Set the upper bound of the inertia ratio automatically adjusted in Quick Tuning.
Prerequisite Tuning: Control gain set - Automatic switch (No.120.0): 1 (Enable)
Related To No.110.1, No.120.0
7
Tuning
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