Yaskawa servo drive debugging method

Create Date: 2024-8-30 12:03:23|Source: YASKAWA/Yaskawa

Some methods when debugging Yaskawa servo drives

In the Yaskawa servo system under low rigidity (1-4) load, the inertia ratio is very important, from the perspective of the synchronous belt structure, the stiffness is about 1-2 (or even less than 1), at this time, the inertia ratio can not be automatically tuned, and the servo amplifier must be in a non-automatic tuning state

Inertia ratios range from 450 to 1600 (depending on load)

At this time, the stiffness range is 1-3, and even 4 can be set; But sometimes it can be less than 1

Stiffness: the resistance of the motor rotor to the load inertia, that is, the self-locking ability of the motor rotor, the smaller the stiffness, the more likely the motor rotor is to produce low-frequency vibration, and the load will shake left and right after reaching the set position; stiffness is used in conjunction with the ratio of inertia; If the stiffness is much higher than the inertia ratio matching value, the motor will oscillate at high frequency, which is manifested as a high-frequency harsh sound emitted by the motor. All of these undesirable behaviors occur when the servo signal (SV_ON) is ON and the load is connected

The reason for the phenomenon of overtaking after positioning and then automatically returning: the position loop gain is set too large, mainly at low rigid loads

Load inertia:

The inertia of the motor shaft side needs to be within 5-10 times of the inertia of the motor itself, if the inertia of the motor shaft side is much larger than the inertia of the motor itself, the motor needs to output a larger rotation distance, the acceleration and deceleration process time is longer, and the response is slower

Whether the motor is connected to the speed bump, if the speed bump ratio is 1/n, the shaft inertia of the speed bump is (1/n)2 of the original motor shaft side inertia.

The above are some of the methods for Yaskawa servo drive debugging

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