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Special adjustment functions, 1 function block diagram, 2 machine resonance suppression filter – MITSUBISHI ELECTRIC MELSERVO MR-J2S- A User Manual

Page 182

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8. SPECIAL ADJUSTMENT FUNCTIONS

8. SPECIAL ADJUSTMENT FUNCTIONS

POINT

The functions given in this chapter need not be used generally. Use them

if you are not satisfied with the machine status after making adjustment
in the methods in Chapter 7.

If a mechanical system has a natural resonance point, increasing the servo system response level may
cause the mechanical system to produce resonance (vibration or unusual noise) at that resonance
frequency.
Using the machine resonance suppression filter and adaptive vibration suppression control functions can
suppress the resonance of the mechanical system.

8.1 Function block diagram

Speed

control

Machine resonance

suppression filter 2

Encoder

Current

command

Low-pass

filter

Parameter

No.58

Parameter

No.60

Parameter

No.59

Parameter

No.60

Machine resonance

suppression filter 1

Adaptive vibration

suppression control

00

or

1

2

0

00

0

1

00

except

00

except

Servo
motor

8.2 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) and gain decreasing depth.

Mechanical
system
response
level

Machine resonance point

Frequency

Notch
depth

Notch frequency

Frequency