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4
PARAMETERS
143
Position control by vector control
4.6.7 Trouble shooting for when position control is not exercised normally
REMARKS
The speed command of position control relates to speed control. (Refer to page 98 )
Vector
Vector
Vector
Motor or machine is
hunting.
Y
N
The position loop gain
(Pr. 422) is high.
Decrease
the position loop gain
(Pr. 422).
Set the electronic gear.
(Pr. 420, Pr. 421)
N
Have you made
the electronic gear
setting?
Y
Y
N
Perform easy gain tuning.
The speed control gain is high.
Decrease the speed control
proportional gain (Pr. 820).
Increase the speed control
integral time (Pr. 821).
Machine operation is
unstable.
Y
N
Do not turn off the forward
(reverse) rotation stroke end
signal before completion of
positioning.
Y
The forward (reverse)
rotation stroke end signal has
turned off before completion
of positioning.
N
Y
Position shift occurs.
N
Insufficient torque.
Increase the excitation
ratio (Pr. 854).
Check the speed
control measures.
N
Y
Position control is not
exercised normally
Have you checked
the speed control items?
Please contact your sales
representative.