Panasonic MINAS S Series Operating Manual page 95

Troubleshooting
Overshoot or undershoot
The motor overheats (burnt)
Category
Adjustment Gains are not correct.
Installation Load inertia is too large.
Rattling or slip of the machine
Environment
temperature, etc.)
The cooling fan does not work.
The air intake is dirty.
Mismatch between the amplifier
and motor
Motor bearings fail.
The electromagnetic brake is ON
(failure to release the brake).
The motor fails (due to oil, water,
etc.).
The motor is operated by external
forces while the dynamic brake is
activated.
The motor speed does not increase up to the specified value.
The speed (movement) is too large or small.
Category
Adjustment The position loop gain is too small. Adjust the value of Pr10 (position loop gain) to
Causes
Check the gains using the wave form graphics
monitoring function of PANATERM
and/or torque monitor (IM). Adjust the gains. See
"Adjustments" chapter.
Check the load inertia using the wave form graphics
monitoring function of PANATERM
Check the coupling between the motor and machine.
Increase the capacity of the motor and amplifier use a
geard motor to decrease inertia ratio.
Check the fitting part of the machine.
(ambient If the ambient temperature is higher than the specified
value, install a cooling fan.
Check the cooling fan of the amplifier.
Check the nameplates of the amplifier and motor. For
available combinations between amplifier and motor,
see the instruction manuals or catalogues.
Turn off the power. Rotate the motor shaft by hand to
check whether abnormal sound (rumbling) occurs or not.
If it rumbles, replace it with a new one, or repair it.
Check the voltage at the brake terminal. Apply 24VDC
to release the brake.
Avoid high temperature/humidity, oil, dust and iron
powders.
Check the operation pattern, use and working status.
This kind of operation should be avoided.
Causes
approximately 100.
- 94 -
Countermeasures
"
, speed monitor (SP)
"
, speed monitor
Countermeasures