79
ORIENTATION CONTROL AT A MACHINE END— V500
6.5.6
Orientation Deceleration Ratio
(1) Pr. 399 "orientation deceleration ratio" (factory setting: 20)
Make adjustments as shown below according to the orientation status.
(Refer to the Pr. 396 and Pr. 397 details also.)
Generally adjust Pr. 362 in the range from 5 to 20 and Pr. 399 from 5 to 50.
REMARKS
*1. Servo rigidity: This is the response when a position control loop is configured.
When the servo rigidity is raised, the holding force will increase, the running will stabilize, but
vibration will occur easily.
When the servo rigidity is lowered, the holding force will drop, and the setting time will increase.
*2. Limit cycle: This is a phenomenon that generates ± continuous vibration centering on the target position.
Phenomenon
Adjustment Procedure
Pr.396 Pr.397 Pr.362 Pr.399
Rocking occurs during stopping 3)
3)
2)
1)
The orientation time is long
2)
1)
Hunting occurs when stopping 2)
2)
1)
The servo rigidity during
stopping is low
1)
1)
2)
CAUTION
If orientation stop is not possible and the excessive position error alarm occurs, or if the motor
does forward/reverse reciprocation operation
, the parameter setting value for the orientation
detector installation direction may be incorrect. Review Pr. 393 "orientation selection".
REMARKS
1.
: Increase the parameter setting value.
: Do not change the parameter setting value.
: Decrease the parameter setting value.
2. The numbers 1) 2) and 3) in the table show the
order of priority for changing the parameters
setting value.
