Adaptive Filter Ii - Mitsubishi Electric MELSERVO-J4 Series Instruction Manual

Adaptive filter II

• The machine resonance frequency which adaptive filter  (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 seconds 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. If vibration occurs when the
response setting is increased, execute adaptive tuning again.
• During adaptive tuning, a filter having the best notch depth at the set control gain is generated. To allow a
filter margin against machine resonance, increase the notch depth in the manual setting.
• Adaptive vibration suppression control may provide no effect on a mechanical system which has complex
resonance characteristics.
Function
Adaptive filter  (adaptive tuning) is a function in which the servo amplifier detects machine vibration 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.
Machine resonance point
Notch frequency
When machine resonance is large and
frequency is low
Parameter
Select how to set the filter tuning in [Pr. PB01 Adaptive tuning mode (adaptive filter )].
[Pr. PB01]
0 0 0
Filter tuning mode selection
Setting
value
7 SPECIAL ADJUSTMENT FUNCTIONS
250
7.1 Filter setting
Frequency
Frequency
Filter tuning mode selection
0 Disabled
1 Automatic setting
2 Manual setting
Machine resonance point
Notch frequency
When machine resonance is small and
frequency is high
Automatically set parameter
«
PB13/PB14
«
Frequency
Frequency