Chapter 4 Vibration Suppression Function; Filter Setting; Machine Resonance Suppression Filter - Mitsubishi Electric MELSERVO J5 Series User Manual

4
VIBRATION SUPPRESSION FUNCTION
Increasing the servo system response level in a mechanical system that has a unique resonance point may cause resonance
(vibration or unusual noise) in the mechanical system at that resonance frequency. By using various type of filters, resonance
of the mechanical system can be suppressed, improving the responsiveness of the servo system.
4.1

Filter setting

The following filters are available with MR-J5 Servo amplifiers.
Command
Command
pulse train
notch filter
4.2

Machine resonance suppression filter

If a mechanical system has a unique resonance point, increasing the servo system response level may cause resonance
(vibration or unusual noise) in the mechanical system at that resonance frequency. Using the machine resonance suppression
filter and adaptive tuning can suppress the resonance of the mechanical system. When the mechanical system resonates and
does not meet the required performance, use the machine resonance suppression filter.
The following five machine resonance suppression filters can be set simultaneously and the setting range is between 10 Hz
and 9000 Hz.
Filter
Machine resonance
suppression filter 1
Machine resonance
suppression filter 2
Machine resonance
suppression filter 3
Machine resonance
suppression filter 4
Machine resonance
suppression filter 5
Precautions
• If the frequency of machine resonance is unknown, decrease the notch frequency from higher to lower. The optimum notch
frequency is set at the point where vibration is minimal.
• By using the machine analyzer in MR Configurator2 to understand the mechanical characteristics, the frequency and
characteristics of the notch can be determined.
4 VIBRATION SUPPRESSION FUNCTION
50
4.1 Filter setting
Speed
control
Advanced
+
vibration
suppression filter setting
-
control 2
[Pr. PB49]
Servo parameter Servo parameter that is
reset with the vibration
tough drive function
PB01/PB13/PB14 PB01/PB13
PB15/PB16 PB15/PB16

PB46/PB47

PB48/PB49

PB50/PB51
[Pr. PB18] [Pr. PB13] [Pr. PB15]
Machine Machine
Low-pass
resonance resonance
suppression suppression
filter 1
[Pr. PB48]
[Pr. PE41]
Machine
resonance
suppression
filter 4
[Pr. PB17]
Shaft
resonance
suppression
filter
Servo parameter
automatically adjusted
with one-touch tuning
PB01/PB13/PB14
PB15/PB16
PB47
PB48/PB49
PB51
[Pr. PB23]
[Pr. PB47]
[Pr. PB23.3] = "0" or
[Pr. PB47.0] = "1"
[Pr. PB23.3] = "1" and
[Pr. PB47.0] = "0"
filter 2
[Pr. PB50]
Machine
resonance
suppression
filter 5
PWM
Robust filter
Servo parameter
automatically adjusted
with quick tuning
PB01/PB13/PB14
PB15/PB16


PB50/PB51
[Pr. PB46]
Machine
resonance
suppression
filter 3
Shaft
resonance
suppression
filter 2
Load
Encoder
M
Servo motor