Omron OMNUC FND Series User Manual page 220

Application
Symptom Probable cause
Motor is over-
The ambient temperature is too
heating.
high.
The ventilation is obstructed.
There is an overload.
There are
The machinery is vibrating.
unusual noises.
The speed loop gain adjustment
is insufficient.
The parameters The parameters are write-pro-
cannot be tected.
changed.
Output torque is The motor has only made small
insufficient movements (approx. 6 pulses
of encoder resolution) from the
power supply position.
4-28
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Items to check
Check to be sure that the ambi-
ent temperature around the
motor is no higher than 40 C.
Check to see whether anything
is blocking ventilation.
Use the Monitor Mode to check
the electrothermal value.
Inspect the machinery to see
whether there are any foreign
objects in the movable parts, or
whether there is any damage,
deformation, or looseness.
---
Check the computer's
monitoring software.
---
Chapter 4
Countermeasures
Lower the ambient temperature
to 40 C or lower. (Use a cooler
or fan.)
Ensure adequate ventilation.
Lighten the load.
Change to a larger capacity
motor.
Fix any problems causing vibra-
tion.
Use auto-tuning.
Adjust the gain manually.
Using the computer's monitoring
software, release the write
protection.
After making the motor perform
rotations of over 6 pulses,
re-attempt normal operation.