Yaskawa Sigma-5 User Manual: Setup for Linear Motors - Manual (Page 161)

5.6 JOG Operation
5-25
5
T
rial Operation (Checking Linear Servomotor Operation)
 When Noises from the Linear Servomotor Cause a Problem
Select the Speed Detection 2 by setting the parameter Pn009.2 (Speed Detection
Method Selection) to 1. And, turn OFF the power to the SERVOPACK and then ON
again to enable the setting. It will be effective for the scale with a relatively long scale
pitch.
If noises still cause a problem after having changed the speed detection method, use
the current gain level setting function to change the current gain level.
The current gain level setting function reduces noises by adjusting the parameter
value for current control inside the SERVOPACK in accordance with the parameter
value for the speed loop gain (Pn100). To change the parameter value for current
control, the current gain level must be changed from 2000%, which is the default
value of Pn13D to disable this function. This function is always disabled in force
control mode (Pn000.1 = 2).
Note: If the set value of Pn13D is decreased, the level of noise will be lowered, but
the responsiveness of the SERVOPACK will also be degraded. Lower the cur-
rent gain level to one at which SERVOPACK responsiveness can be secured
.
After having checked the above items, increase the values for the force limit function
(Pn483 and Pn484) up to the required force. Set the value to the maximum value
800% if no particular restricting conditions apply.
Setup is finished when all these checks have been completed.
The tuning-less function is by default set enabled. When the tuning-
less function is enabled, the gain may be so increased to cause vibra-
tion during no-load operation. If vibration occurs, disable the tuning-
less function by setting the parameter Pn170.0 to 0.
Parameter Meaning When Enabled Classification
Pn009
n.0 Selects the speed detection 1
[factory setting)
After restart Tuning
n.1 Selects the speed detection 2.
Pn13D
Current Gain Level
Classification
Setting Range Unit Factory Setting When Enabled
100 to 2000 1% 2000 Immediately Tuning
Speed Position