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7. SPECIAL ADJUSTMENT FUNCTIONS
7.2.2 Adaptive filter
(1) Function
The adaptive filter (adaptive tuning) sets the filter characteristics automatically with the one-touch tuning,
and suppresses vibrations of the mechanical system. Since the filter characteristics (frequency, depth) are
set automatically, you need not be conscious of the resonance frequency of a mechanical system.
Mechanical
system
response
level
Machine resonance point
Notch frequency
Frequency
Notch frequency
Frequency
Frequency
Mechanical
system
response
level
Machine resonance point
Frequency
Notch
depth
Notch
depth
When machine resonance is large and frequency is low
When machine resonance is small and frequency is high
POINT
When the one-touch tuning is performed, the adaptive tuning is performed, and
the machine resonance suppression filter 1 (parameter No. PB13) and the notch
shape selection 1 (parameter No. PB14) are set automatically.
The machine resonance frequency which adaptive tuning mode can respond to
is about 100 to 2.25kHz. Adaptive vibration suppression control has no effect on
the resonance frequency outside this range.
Adaptive vibration suppression control may provide no effect on a mechanical
system which has complex resonance characteristics.
(2) Parameters
The operation of adaptive tuning mode (parameter No. PB01).
Parameter No. PB01
Selection of adaptive tuning mode
0 0
Setting
Adaptive tuning mode
Manually set parameter No.
0
Filter OFF
(Note 1)
2(Note 2) Manual mode
Parameter No. PB13
Parameter No. PB14
Note 1. Parameter No. PB13 and PB14 are fixed to the initial values.
2. When an adaptive filter is set, it is automatically updated to "2".
POINT
"Filter OFF" enables a return to the factory-set initial value.
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 mode.