Re: (ET) hot motor

["RJ Kanary" <rjkanary nauticom net>]

     The GE and Built for GE motors have a tab cast on the brush end bell. 
This mates with a corresponding slot on the magnet / shell of the motor.

----- Original Message ----- 
From: "Steve Gaarder" <gaarder ecovillage ithaca ny us>
To: "RJ Kanary" <rjkanary nauticom net>
Cc: "et" <Elec-trak cosmos phy tufts edu>
Sent: Sunday, August 06, 2006 1:42 PM
Subject: Re: (ET) hot motor


> Thanks.  How do I tell if the orientation is screwed up on an E12M deck 
> motor, and how do I unscrew it?
>
> thanks again,
>
> Steve
>
> On Sun, 6 Aug 2006, RJ Kanary wrote:
>
> >           Permanent magnet motor? {I'm getting in a rut, aren't I ? } The 
> > field poles have to have a particular alignment in relation to the brush 
> > location on the commutator.Torque can be biased to be increased in one 
> > direction of rotation, lessened in the other. Ever notice how a cordless 
> > drill has more torque going 'forward' than in reverse? That's why.
> >       If the orientation is screwed up, you can end up with an armature 
> > that uses gobs of amps......and turns most of them into heat.
> >      The same thing can be done to a wound field motor.
> >
> > ----- Original Message ----- From: "Steve Gaarder" 
> > <gaarder ecovillage ithaca ny us>
> > To: "RJ Kanary" <rjkanary nauticom net>
> > Cc: "et" <Elec-trak cosmos phy tufts edu>
> > Sent: Sunday, August 06, 2006 12:48 PM
> > Subject: Re: (ET) hot motor
> >
> >
> > > Can you explain this a little more clearly?  I have a similar problem - 
> > > a motor (on an E12M) that runs, but gets hot.  A local motor shop 
> > > checked it and said that things seemed fine.
> > >
> > > thanks,
> > >
> > > Steve Gaarder
> > >
> > > On Sun, 6 Aug 2006, RJ Kanary wrote:
> > >
> > > >        Permanent magnet motor ? If so, did you mark the brush end bell
> > > > orientation before disassembly? If not, that could be the culprit. The 
> > > > GE
> > > > and made for GE motors have tabs and slots to prevent this. Just a
> > > > thought.................
> > > >
> > > > ----- Original Message -----
> > > > From: "Neil Dennis" <wombatt gmail com>
> > > > To: "et" <Elec-trak cosmos phy tufts edu>
> > > > Sent: Sunday, August 06, 2006 11:13 AM
> > > > Subject: (ET) hot motor
> > > >
> > > >
> > > > > Lets see if this one bounces !!
> > > > >
> > > > > I just pulled one of the mower motors from the JD, it was running 
> > > > > "weak"
> > > > > andgot hot enough to burn off one of the motor terminal wires at the
> > > > > chassis connector [;-[   It seems to spin over ok by hand, I put in a
> > > > > new lower bearing this spring (the old one was getting noisy) and hope 
> > > > > I
> > > > > got it together right - it has been running weak since then but sees 
> > > > > to
> > > > > by slowly dying.
> > > > >  Any thoughts as to what I could look for or what i may have screwed
> > > > > up, it had been ok before the teardown.
> > > > >
> > > > > wombat
> > > > >
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> > > > > Elec-trak cosmos phy tufts edu
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> > > >
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