Re: help. Kostov problem

["1sclunn" <1sclunn@msn.com>]

It seemed to use a lot of amps also and the way it shook and stoped shacking
when 12v power was re moved .. What would couse shorted coils ?? what do I
do now ???
----- Original Message -----
From: "Steve Downing" <s.downing@elec.canterbury.ac.nz>
To: <ev@listproc.sjsu.edu>
Sent: Wednesday, July 31, 2002 10:35 PM
Subject: Re: help. Kostov problem


> At 11:54 PM 7/31/02 -0700, you wrote:
> >.I first though its a bearing but
> >today when I take the motor out every thing looks fine . when I spin the
> >motor over by hand It turns real nice no noise or grabbing . I hook a 12v
> >battery to it and it truns veary slow and shacks like its fighting its
self
> >. As soon as I remove the wire it smothes out . connect it and it starts
to
> >shake. the armiture looks ok ,I don't realy know what I'm looking for .
>
> I hope I'm wrong, but from the sound of the symptoms I would say that
> you have some shorted coils in the armature.
>
> It may only be that the brush springs have been too hot and are no longer
> pushing down hard enough. This is usually accompanied with a ticking or
> an pulsating sound.
don't see or hear that >
> Look for signs of arcing on only a couple of commutator bars about 45 deg
> apart.
will look tommorw
> Does the motor smell OK or does it have a burnt smell?
didn't smell any thing, sniffed real hard >

> Regards Steve
>
>