Low-Pass Filter - Mitsubishi Electric MR-J2S B Series Instruction Manual

7. SPECIAL ADJUSTMENT FUNCTIONS
(2) Parameters
The operation of adaptive vibration suppression control selection (parameter No. 25).
Parameter No. 25

7.4 Low-pass filter

(1) Function
When a ball screw or the like is used, resonance of high frequency may occur as the response level of
the servo system is increased. To prevent this, the low-pass filter is factory-set to be valid for a torque
command. The filter frequency of this low-pass filter is automatically adjusted to the value in the
following expression.
Filter frequency
(Hz)
2
(2) Parameter
Set the operation of the low-pass filter (parameter No. 25).
Adaptive vibration suppression control selection
0: Invalid
1: Valid
Machine resonance frequency is always detected to
generate the filter in response to resonance, suppressing
machine vibration.
2: Held
Filter characteristics generated so far is held, and detection of
machine resonance is stopped.
Adaptive vibration suppression control sensitivity selection
Set the sensitivity of detecting machine resonance.
0: Normal
1: Large sensitivity
POINT
Adaptive vibration suppression control is factory-set to be "invalid"
(parameter No. 25: 0000).
Selection the adaptive vibration suppression control sensitivity can change
the sensitivity of detecting machine resonance. Selection of "large
sensitivity" detects smaller machine resonance and generates a filter to
suppress machine vibration. However, since a phase delay will also
increase, the response of the servo system may not increase.
Speed control gain 2 set value 10
(1 ratio of load inertia moment to servo motor inertia moment set value
Parameter No. 25
Low-pass filter selection
0: Valid (automatic adjustment)
1: Invalid
POINT
In a mechanical system where rigidity is extremely high and resonance is
difficult to occur, setting the low-pass filter to be "invalid" may increase the
servo system response to shorten the settling time.
initial value
7 - 4
0.1)