Mitsubishi Electric MELSERVO-J3W Series, Instruction Manual

Page: 131 / 500

7. SPECIAL ADJUSTMENT FUNCTIONS
7 - 2
Mechanical
system
response
level
Machine resonance point
Frequency
Notch
depth
Parameter No.PB01,
PB13, PB14 Parameter No.PB15,
PB16
Frequency
(2) Parameters
(a) Machine resonance suppression filter 1 (parameter No.PB13, PB14)
Set parameter No.PB01 to " 2".
Set the notch frequency, notch depth and notch width of the machine resonance suppression filter 1
(parameter No.PB13, PB14)
(b) Machine resonance suppression filter 2 (parameter No.PB15, PB16)
Set parameter No.PB16 to " 1".
Setting method for the machine resonance suppression filter 2 (parameter No.PB15, PB16) is same as
for the machine resonance suppression filter 1 (parameter No.PB13, PB14).
POINT
The machine resonance suppression filter is a delay factor for the servo system.
Hence, vibration may increase if you set a wrong resonance frequency or a too
deep notch.
If the frequency of machine resonance is unknown, decrease the notch frequency
from higher to lower ones in order. The optimum notch frequency is set at the point
where vibration is minimal.
A deeper notch has a higher effect on machine resonance suppression but
increases a phase delay and may increase vibration.
A deeper notch has a higher effect on machine resonance suppression but
increases a phase delay and may increase vibration.
The machine characteristic can be grasped beforehand by the machine analyzer on
the MR Configurator. This allows the required notch frequency and depth to be
determined.