10 - 1
10. SPECIAL ADJUSTMENT FUNCTIONS
10. 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 9.
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 tuning can suppress the resonance of the
mechanical system.
10.1 Function block diagram
M
Speed control
Machine resonance
suppression filter 1
Filter tuning
mode
Manual mode
Parameter
No.PB01
Machine resonance
suppression filter 2
1
0
1
0
0
1
2
Parameter
No.PB16
Low-pass filter
Manual setting
Parameter
No.PB23
Current
command
Servo
motor
Encoder
Automatic setting
10.2 Adaptive filter
(1) Function
Adaptive filter (adaptive tuning) is a function in which the servo amplifier detects machine vibration for a
predetermined period of time and sets the filter characteristics automatically to suppress mechanical
system vibration. Since the filter characteristics (frequency, depth) are set automatically, you need not be
conscious of the resonance frequency of a mechanical system.
Mechanical
system
response
level
Mechanical
system
response
level
Machine resonance point
Machine resonance point
Frequency
Frequency
Notch
depth
Notch
depth
Notch frequency
Notch frequency
Frequency
Frequency
When machine resonance is large and frequency is low When machine resonance is small and frequency is high
POINT
The machine resonance frequency which adaptive filter II (adaptive tuning)
can respond to is about 100 to 2.25kHz. Adaptive vibration suppression
control has no effect on the resonance frequency outside this range.
Adaptive vibration suppression control may provide no effect on a mechanical
system which has complex resonance characteristics.
Summary of Contents for Melservo-J3 Series MR-J3-B
Page 19: ...10 MEMO ...
Page 55: ...1 36 1 FUNCTIONS AND CONFIGURATION MEMO ...
Page 61: ...2 6 2 INSTALLATION MEMO ...
Page 179: ...4 58 4 SIGNALS AND WIRING MEMO ...
Page 241: ...5 62 5 OPERATION MEMO ...
Page 357: ...10 16 10 SPECIAL ADJUSTMENT FUNCTIONS MEMO ...
Page 385: ...11 28 11 TROUBLESHOOTING MEMO ...
Page 397: ...12 12 12 OUTLINE DRAWINGS MEMO ...
Page 755: ...17 70 17 SPEED CONTROL OPERATION MEMO ...
Page 793: ...App 38 APPENDIX MEMO ...
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