Xinje DS5F Series, User Manual

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6.2
Rotary inertia presumption
6.2.1 Overview
Rotational inertia estimation is the function of automatic operation (forward and reverse) in the driver
and estimate the load inertia in operation.
Rotational inertia ratio (the ratio of load inertia to motor rotor inertia) is a benchmark parameter for
gain adjustment, and it must be set to the correct value as far as possible.
Parameter Meaning
Default
setting
Unit Setting range Modification Effective
P0-07 First inertia ratio 200 % 0~50000 Anytime At once
6.2.2 Notes
Occasions where inertia cannot be presumed

Mechanical systems can only operate in one direction
The occasion where inertia presumption is easy to fail

Excessive load moment of inertia

The running range is narrow and the travel is less than 0.5 circles.

The moment of inertia varies greatly during operation.

Mechanical rigidity is low and vibration occurs when inertia is presumed.
Notes of Inertia Presumption

Since both directions are rotatable within the set range of movement, please confirm the
range or direction of movement; and ensure that the load runs in a safe journey.

If the presumed inertia under default parameters runs jitter, indicating that the present load
inertia is too large, please switch to large inertia mode (P2-03.3=1) and operate again. It is
also possible to set the initial inertia to about twice the current one and execute again under
larger loads.

Driver inertia ratio recognition upper limit is 200 times (parameter upper limit is 20000). If
the estimated inertia ratio is exactly 20000, it means that the inertia ratio has reached the
upper limit and can not be used, please replace the motor with larger rotor inertia.
Other notes

At present, the inertia switching function is not supported, and the second inertia ratio is
invalid.

The inertia ratio upper limit changes to 500 times for the driver firmware 3700 and higher
version (parameter upper limit value is 50000).
6.2.3 Operation tool
The presumptive tools of load moment of inertia are driver panel and XinjeServo software.
Operation tool Description
Driver panel Driver firmware needs 3700 and higher version
XinjeServo software All versions of software supported
Note: driver firmware version can be checked through U2-07.