Bose MR-J2S- B Special Adjustment Functions, Machine resonance suppression filter Function

7.SPECIAL ADJUSTMENT FUNCTIONS

7.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 6.

If a mechanical system has a natural resonance point, increasing the servo system response 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.

7.1 Function block diagram

Speed

Parameter

Parameter

Parameter

Current

control

No.18

No.25

No.25

command

00

0

Low-pass

0

Servo

filter

motor

1

Encoder

Machine resonance

suppression filter 1

except

00

Adaptive vibration

suppression control

1

or

2

7.2 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	Machine resonance point
system
response
	Frequency

Notch depth

Notch frequency

POINT

Frequency

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.

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