5 Adjustments
5.2.1 Tuning-less Function
5-10
5.2
Tuning-less Function
The tuning-less function is enabled in the factory setting. Do not disable this function for normal applications.
If resonance is generated or excessive vibration occurs during position control, refer to
5.2.2 Tuning-less Lev-
els Setting (Fn200) Procedure
and reduce the set value of Pn170.2 for the tuning-less adjustment level and the
set value in Pn170.3 for the tuning-less load level.
5.2.1
Tuning-less Function
The tuning-less function obtains a stable response without adjustment regardless of the type of machine or
changes in the load.
(1) Enabling/Disabling Tuning-less Function
The following parameter is used to enable or disable the tuning-less function.
(2) Application Restrictions
The tuning-less function can be used in position control or speed control. This function is not available in
force control.
However, set Pn170.1 = 1 when implementing a position loop in the host controller while the SERVOPACK is
used as a speed control.
The following application restrictions apply to the tuning-less function.
CAUTION
• The tuning-less function is enabled in the factory setting. A sound may be heard for a moment when the
linear servomotor power is turned ON for the first time after the servo drive is mounted to the machine.
This sound does not indicate any problems; it means that the automatic notch filter was set. The sound will
not be heard from the next time the linear servomotor power is turned ON. For details on the automatic
notch filter, refer to
(3) Automatically Setting the Notch Filter
on the next page.
• The linear servomotor may vibrate if the mass ratio exceeds 30.
If vibration occurs, set the mode to 2 in Fn200 or lower the adjustment level.
Parameter
Meaning
When Enabled
Classification
Pn170
n.
0
Disables tuning-less function.
After restart
Setup
n.
1
Enables tuning-less function. [Factory setting]
n.
0
Used as speed control. [Factory setting]
n.
1
Used as speed control and host controller used as
position control.
Control Function
Availability
Remarks
Vibration detection level initialization
(Fn01B)
Available
Advanced autotuning (Fn201)
Available
(Some conditions apply)
• This function can be used when the mass is
calculated.
• While this function is being used, the tun-
ing-less function cannot be used tempo-
rarily.
Advanced autotuning by reference (Fn202)
Not available
One-parameter tuning (Fn203)
Not available
Anti-resonance control adjustment
function (Fn204)
Not available
Vibration suppression function (Fn205)
Not available
EasyFFT (Fn206)
Available
While this function is being used, the tuning-
less function cannot be used temporarily.
Friction compensation
Not available
Gain switching
Not available
Offline Mass Setting *
Not available
