Trouble Shooting For When Position Control Is Not Exercised Normally - Mitsubishi Electric FR-A720-0.4K Instruction Manual

Fr-a700 series
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4.6.7

Trouble shooting for when position control is not exercised normally

Position control is not
exercised normally
Have you checked
the speed control items?
Position shift occurs.
Motor or machine is
Machine operation is
Please contact your sales
representative.
REMARKS
The speed command of position control relates to speed control. (Refer to page 96 )
N
Check the speed
Y
control measures.
Y
Have you made
N
the electronic gear
setting?
The forward (reverse)
rotation stroke end signal has
turned off before completion
of positioning.
Y
hunting.
N
The position loop gain
(Pr. 422) is high.
Decrease
the position loop gain
(Pr. 422).
Y
unstable.
Insufficient torque.
Increase the excitation
N
ratio (Pr. 854).
Position control by vector control
N
Set the electronic gear.
Y
(Pr. 420, Pr. 421)
Y
Do not turn off the forward
(reverse) rotation stroke end
N
signal before completion of
positioning.
N
Y
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).
Vector
Vector
Vector
4
139

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