Machine Resonance Suppression Filter - Mitsubishi Electric MR-J3-10B Instruction Manual

7. SPECIAL ADJUSTMENT FUNCTIONS
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7.3 Machine resonance suppression filter

(1) Function
The machine resonance suppression filter is a filter function (notch filter) which decreases the gain of the
specific frequency to suppress the resonance of the mechanical system. You can set the gain decreasing
frequency (notch frequency), gain decreasing depth and width.
You can use the machine resonance suppression filter 1 (parameter No. PB13, PB14) and machine
resonance suppression filter 2 (parameter No. PB15, PB16) to suppress the vibration of two resonance
frequencies. Execution of adaptive tuning in the filter tuning mode automatically adjusts the machine
resonance suppression filter. When adaptive tuning is ON, the adaptive tuning mode shifts to the manual
mode after the predetermined period of time. The manual mode enables manual setting using the machine
resonance suppression filter 1.
POINT
"Filter OFF" enables a return to the factory-set initial value.
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 mode.
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 mechane resonance,
increase the notch depth in the manual mode.
Mechanical
system
response
level
Notch
depth
Notch frequency
Machine resonance point
Mechanical
system
response
level
Notch
depth
Parameter No. PB01,
PB13, PB14
7 - 4
Machine resonance point
Frequency
Notch width
Notch depth
Frequency
Frequency
Frequency
Parameter No. PB15,
PB16