Mitsubishi Electric MELSERVO-J2S Series Transition Handbook page 488

[Appendix 1] Summary of MR-J4_B_-RJ020 + MR-J4-T20
(a) Configuration of adaptive vibration suppression control function
Adaptive vibration suppression control consists of the following two functions.
Adaptive filter II
Vibration tough drive
At the initial setting, the adaptive filter II operates automatically and the machine resonance
suppression filter is automatically estimated. After that, the vibration tough drive function measures
the machine resonance variation and resets the setting value of the machine resonance suppression
filter.
When the machine vibration does not stop after the vibration tough drive function resets the filter,
readjust the setting with the adaptive filter II.
(b) Adaptive filter II
1) Operation
Adaptive filter II (adaptive tuning) is a function in which the servo amplifier detects machine resonance
for a predetermined period of time and sets the filter characteristics automatically to suppress
mechanical system vibration. Since the filter characteristics (frequency, depth) are set automatically,
you need not be conscious of the resonance frequency of a mechanical system.
Notch frequency
When machine resonance is large and
frequency is low
POINT
The machine resonance frequency which adaptive filter II (adaptive tuning) can
respond to is about 100 Hz to 2.25 kHz. As for the resonance frequency out of the
range, set manually.
When adaptive tuning is executed, vibration sound increases as an excitation
signal is forcibly applied for several seconds.
When adaptive tuning is executed, machine resonance is detected for a maximum
of 10 s and a filter is generated. After filter generation, the adaptive tuning mode
automatically shifts to the manual setting.
Adaptive tuning generates the optimum filter with the currently set control gains.
Adaptive vibration suppression control may provide no effect on a mechanical
system which has complex resonance characteristics.
This adaptive filter II (adaptive tuning mode) is different from the function of MR-
J2S-_B_ and equivalent to that of MR-J4-_B_. Tuning accuracy can be set only in
standard mode.
Machine resonance point
Frequency
Frequency
Appendix 1-25
Machine resonance point
Notch frequency
When machine resonance is small and
frequency is high
Frequency
Frequency