If the Mentor is going out on OAC,you have an overcurrent fault.First thing is to disconnect the motor electrically from the drive andcheck the resistance of the field and armature,assuming it`s a wound field motor,then megger the armature and field windings to each other and earth.Check the brush lengths and make sure they are free to move in the holders.They are not difficult motors to strip,just take time and mark everything.
There could still be a thyristor problem in the drive as George suggests but I think that is monitored and would have it`s own alarm,although I would need to look at the manual to confirm this.
Another thought,has anyone one been altering drive parameters?It may be worthwhile checking the setting of,armature volts and max current,field volts and current setting,max rpm then do an autotune.
All this is assuming you have disconnected the motor mechanically and spun it by hand to check for binding and noise,likewise the machine side.
Motori have downloads on their site for which you have to register.I have registered but no reply as yet.
Mark.
Last edited by gridley51; 09-19-2008 at 04:02 AM.
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