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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.