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4.3
Adaptive filter II
Adaptive filter II (adaptive tuning) is a function in which the servo amplifier detects machine resonance for a certain period of
time and sets the filter characteristics automatically to suppress mechanical system vibration. Since the filter characteristics
(frequency and depth) are set automatically, there is no need to be aware of the resonance characteristics of the mechanical
system. When the mechanical characteristics are unknown even at mechanical resonance occurrence, the use of the
adaptive tuning is recommended.
• When machine resonance is large and frequency is low
Machine resonance point
Notch frequency
• When machine resonance is small and frequency is high
Machine resonance point
Notch frequency
Precautions
• 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 adaptive filter II manually.
• 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 an optimum filter with the currently set control gain. If vibration occurs when the response setting
is increased, execute adaptive tuning again.
• Adaptive tuning generates a filter with an optimum notch depth for the set control gain. To allow a wider range of the
resonance frequency for filtering, increase the notch depth in the manual setting.
• Adaptive tuning is ineffective on a mechanical system with complex resonance characteristics.
Restrictions on adaptive tuning
Adaptive tuning cannot be used while quick tuning is in progress.
Precautions for adaptive filter II
• When the adaptive tuning is executed, vibration sound increases as the vibration signal is forcibly added for several
seconds.
• In the high-accuracy mode, the frequency is estimated more accurately than in the standard mode, but the sound during
adjustment is larger.
Frequency
Frequency
Frequency
Frequency
4 VIBRATION SUPPRESSION FUNCTION
4.3 Adaptive filter II
4
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