sh030106u.pdf - 第596页

17. APPLICATIO N OF FUNCTIONS 17 - 45 2) Parameter Set the advance d vibra tion s uppress ion contro l II ([ Pr. PB02] a nd [Pr . PX03]) . When you use a v ibration s uppres sion c ontrol, s et "Vi bration su ppres …

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17. APPLICATION OF FUNCTIONS
17 - 44
(c) Advanced vibration suppression control II
POINT
This is enabled when "Gain adjustment mode selection" is "Auto tuning mode 2
(_ _ _ 2)" or "Manual mode (_ _ _ 3)" in [Pr. PA08].
The machine resonance frequency supported in the vibration suppression
control tuning mode is 1.0 Hz to 100.0 Hz. As for the vibration out of the range,
set manually.
Stop the servo motor before changing the vibration suppression control-related
parameters. Otherwise, it may cause an unexpected operation.
For positioning operation during execution of vibration suppression control
tuning, provide a stop time to ensure a stop after vibration damping.
Vibration suppression control tuning may not make normal estimation if the
residual vibration at the servo motor side 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.
When using the vibration suppression control 2, set "_ _ _ 1" in [Pr. PX02].
1) Function
Vibration suppression control is used to further suppress load-side vibration, such as work-side
vibration and base shake. The servo motor-side operation is adjusted for positioning so that the
machine does not vibrate.
Vibration suppression: off (normal)
Servo motor side
Load side
t
Position
Vibration suppression control: on
Servo motor side
Load side
Position
t
When the advanced vibration suppression control II ([Pr. PB02] and [Pr. PX03]) is executed, the
vibration frequency at load side is automatically estimated to suppress machine side vibration two
times at most.
In the vibration suppression control tuning mode, this mode shifts to the manual setting after the
positioning operation is performed the predetermined number of times. For manual setting, adjust
the vibration suppression control 1 with [Pr. PB19] to [Pr. PB22] and vibration suppression control
2 with [Pr. PX04] to [Pr. PX07].
17. APPLICATION OF FUNCTIONS
17 - 45
2) Parameter
Set the advanced vibration suppression control II ([Pr. PB02] and [Pr. PX03]).
When you use a vibration suppression control, set "Vibration suppression control 1 tuning mode
selection" in [Pr. PB02]. When you use two vibration suppression controls, set "Vibration
suppression control 2 tuning mode selection" in [Pr. PX03] in addition.
[Pr. PB02]
Vibration suppression control 1 tuning mode
00
_ _ _ 0
_ _ _ 1
_ _ _ 2
Setting value Vibration suppression control 1 tuning mode selection
Disabled
Automatic setting
Manual setting
PB19/PB20/PB21/PB22
Automatically set parameter
0
[Pr. PX03]
00 0
Vibration suppression control 2 tuning mode
_ _ 0 _
_ _ 1 _
_ _ 2 _
Setting value Vibration suppression control 2 tuning mode selection
Disabled
Automatic setting
Manual setting
PX04/PX05/PX06/PX07
Automatically set parameter
17. APPLICATION OF FUNCTIONS
17 - 46
3) Vibration suppression control tuning procedure
The following flow chart is for the vibration suppression control 1. For the vibration suppression
control 2, set "_ _ 1 _" in [Pr. PX03] to execute the vibration suppression control tuning.
No
Vibration suppression control tuning
Operation
Is the target response
reached?
Execute or re-execute vibration
suppression control tuning.
(Set [Pr. PB02] to "_ _ _ 1".)
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 a machine analyzer or
considering load-side vibration
waveform, set the vibration
suppression control manually.
Factor
Estimation cannot be made as load-side vibration
has not been transmitted to the servo motor side.
The response of the model loop gain has
increased to the load-side vibration frequency
(vibration suppression control limit).
Yes
Tuning ends automatically after
positioning operation is performed
the predetermined number of times.
([Pr. PB02] will be "_ _ _ 2" or
"_ _ _ 0".)
Stop operation.
Resume operation.