Mitsubishi Electric 800 Series Instruction Manual (Function page 187

 Flowchart
NOTE
• The speed command of position control is related to speed control. (Refer to
186
7. Position Control
7.9 Troubleshooting in position control
Position control is not
exercised normally
N
Have you checked
the speed control items?
Y
Y
Position shift occurs.
N
the electronic gear
The forward (reverse)
rotation stroke end signal has
turned off before completion
Y
Motor or machine is
hunting.
N
The position loop gain
Decrease
the position loop gain
(Pr. 422).
Y
Machine operation is
unstable.
Insufficient torque.
Increase the excitation
N
ratio (Pr. 854).
Please contact your sales
representative.
Check the speed
control measures.
Have you made
N
setting?
Set the electronic gear.
Y
(Pr. 420, Pr. 421)
Y
of positioning.
Do not turn off the forward
(reverse) rotation stroke end
signal before completion of
N
positioning.
N
(Pr. 422) is high.
Y The speed control gain is high.
Decrease the speed control
proportional gain (Pr. 820).
Increase the speed control
integral time (Pr. 821).
page 116.)