Daemen Cook Posted January 2 Posted January 2 Put a new cord on my Quiet Blade today. Someone else removed the stator for me while I was out. Noticed some slight damage to the outer fins of the stator, but everything else looked fine aside from a tiny exposed spot in the wrap of the windings. Got the new cord on, went to test it, and it made a single thumping sound and locked it up as if the rotor was magnetized to the stator. When turned off, the blade spins freely, but when on it does not. I didn't see any damage to the windings, but that doesn't necessarily mean there isn't any. Does the motor need rewound, or is the damage to the outside of the stator the cause? Most importantly, is it fixable? Quote
Mark Olson Posted January 2 Posted January 2 (edited) 4 hours ago, Daemen Cook said: Put a new cord on my Quiet Blade today. Someone else removed the stator for me while I was out. Noticed some slight damage to the outer fins of the stator, but everything else looked fine aside from a tiny exposed spot in the wrap of the windings. Got the new cord on, went to test it, and it made a single thumping sound and locked it up as if the rotor was magnetized to the stator. When turned off, the blade spins freely, but when on it does not. I didn't see any damage to the windings, but that doesn't necessarily mean there isn't any. Does the motor need rewound, or is the damage to the outside of the stator the cause? Most importantly, is it fixable? Locking up is (almost) never a winding problem, it is a bearing problem. That is not to say the windings are not hurt, just saying the bearings are probably worn. If the outside diameter of the stator is damaged to the extent that it is no longer concentric in the shell, that could be a problem, however unlikely. Get some prussian blue dye/ink (Napa has it, Permatex brand), apply it to the rotor and stator to give a shiny spot indication of where the parts are rubbing. Edited January 2 by Mark Olson Quote
Lane Shirey Posted January 2 Posted January 2 If the bearing is worn, there may be no signs of rubbing. The rotor will lock up magnetically because it’s no longer centered in the field. Quote
Anthony Lindsey Posted January 2 Posted January 2 If you do not have both sides of the motor housing flush completely against each other that is the result. carefully look where they meet all the way around and if there is a slight gap then that is the issue. That causes the beariing to be at an angle. They need to be flush. Quote
James Lawson Posted January 2 Posted January 2 Adding on to what Anthony said, the rotor may not sit right if the fan has worn or misplaced fiber washers. Also check to make sure oil it making it up to the bearing. Locking up is always a lubrication/bearing issue. Quote
Daemen Cook Posted January 2 Author Posted January 2 6 hours ago, Anthony Lindsey said: If you do not have both sides of the motor housing flush completely against each other that is the result. carefully look where they meet all the way around and if there is a slight gap then that is the issue. That causes the beariing to be at an angle. They need to be flush. That was the exact issue. Thank you very much! 1 Quote
Jim Kovar Posted January 2 Posted January 2 13 hours ago, Daemen Cook said: ...locked it up as if the rotor was magnetized to the stator. When turned off, the blade spins freely, but when on it does not. Magnetized... but no rotatation? Off,... spins freely... Have you tried to spin start the fan? Quote
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