sh030051g.pdf - 第163页
7 - 6 7. SPECIAL ADJUSTMENT FUNCTIONS 7.4 Advanced vibration suppre ssion control (1) Operation Vibration suppression control is used to further suppr ess machine end vibration, such as workpiece end vibration and base s…
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7. SPECIAL ADJUSTMENT FUNCTIONS
(2) Parameters
(a) Machine resonance suppression filter 1 (parameter No.PB13, PB14)
Set the notch frequency, notch depth and notch width of the machine resonance suppression filter 1
(parameter No.PB13, PB14)
When you have made adaptive filter tuning mode (parameter No.PB01) "manual mode", set up the
machine resonance suppression filter 1 becomes effective.
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.
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7. SPECIAL ADJUSTMENT FUNCTIONS
7.4 Advanced vibration suppression control
(1) Operation
Vibration suppression control is used to further suppress machine end vibration, such as workpiece end
vibration and base shake. The motor side operation is adjusted for positioning so that the machine does not
shake.
t t
Position
Position
Motor end
Machine end
Motor end
Machine end
Vibration suppression control OFF
(Normal control)
Vibration suppression control ON
When the advanced vibration suppression control (vibration suppression control tuning mode parameter
No.PB02) is executed, the vibration frequency at machine end can automatically be estimated to suppress
machine end vibration.
In the vibration suppression control tuning mode, this mode shifts to the manual mode after operation is
performed the predetermined number of times. The manual mode enables manual setting using the
vibration suppression control vibration frequency setting (parameter No.PB19) and vibration suppression
control resonance frequency setting (parameter No.PB20).
(2) Parameter
Select the operation of the vibration suppression control tuning mode (parameter No.PB02).
000
Parameter No.PB02
Vibration suppression control
tuning mode
Setting Vibration suppression control tuning mode Automatically set parameter
0 Vibration suppression control OFF (Note)
1
Vibration suppression control tuning mode
(Advanced vibration suppression control)
Parameter No.PB19
Parameter No.PB20
2 Manual mode
Note. Parameter No.PB19 and PB20 are fixed to the initial values.
POINT
The function is made valid when the auto tuning mode (parameter No.PA08)
is the auto tuning mode 2 ("0002") or manual mode ("0003").
The machine resonance frequency supported in the vibration suppression
control tuning mode is 1.0Hz to 100.0Hz. The function is not effective for
vibration outside this range.
Stop the motor before changing the vibration suppression control-related
parameters (parameter No.PB02, PB19, PB20, PB33, PB34). A failure to do
so will cause a shock.
For positioning operation during execution of vibration suppression control
tuning, provide a stop time to ensure a stop after full vibration damping.
Vibration suppression control tuning may not make normal estimation if the
residual vibration at the motor end is small.
Vibration suppression control tuning sets the optimum parameter with the
currently set control gains. When the response setting is increased, set
vibration suppression control tuning again.
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7. SPECIAL ADJUSTMENT FUNCTIONS
(3) Vibration suppression control tuning mode procedure
No
Estimation cannot be made as
machine end vibration has not been
transmitted to the motor end.
The response of the model loop gain
has increased to the machine end
vibration frequency (vibration
suppression control limit).
Vibration suppression control
tuning adjustment
Operation
Is the target response
reached?
Execute or re-execute vibration
suppression control tuning. (Set
parameter No.PB02 to "0001".)
Decrease the response until vibration
of workpiece end/device is resolved.
End
Yes
No
No
Yes
Increase the response setting.
Has vibration of workpiece
end/device increased?
Has vibration of workpiece
end/device been resolved?
Using the machine analyzer or from
machine end vibration waveform, set
the vibration suppression control
manually.
Factor
Yes
Tuning ends automatically after
operation is performed the
predetermined number of times.
(Parameter No.PB02 turns to "0002"
or "0000".)
Stop operation.
Resume operation.