Position Control Is Not Exercised Normally - Mitsubishi Electric FR-V560 Instruction Manual

2.7.11 Position control is not exercised normally

(1) Position control
Position control is not
exercised normally.
Please contact your sales
representative.
REMARKS
The speed command of position control relates to speed control. Refer to the Instruction Manual (basic) for details.
N
Have you checked the
speed control items?
Check the speed
Y
control techniques.
Y
Does a position
shift occur?
N
Have you made the
electronic gear setting?
Has the forward (reverse)
rotation stroke end signal
turned off before
completion of positioning?
Y
Is the motor or
machine hunting?
N
Is the position loop gain
(Pr. 422) high?
Decrease the position
loop gain (Pr. 422).
Y
Is machine operation
unstable?
Torque is insufficient.
N
Increase the excitation
ratio (Pr. 854).
Position control (Pr. 419 to Pr. 430,
Pr. 464 to Pr. 494)
Y
N
Set the electronic gear
Y
(Pr. 420, Pr. 421).
Y
Do not turn off the forward
N (reverse) rotation stroke end
signal before completion of
positioning.
N
Y
Perform easy gain tuning.
The speed control gain is high.
Decrease the speed control
P gain (Pr. 820).
Increase the speed control
integral time (Pr. 821).
65
2