Re: (ET) hot motor

[Steve Gaarder <gaarder ecovillage ithaca ny us>]

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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