[TriEmbed] Stepper Motor

[Shane Trent]

Brian,

Also make sure that none of the motor leads are touching when you try to
turn the shaft. Shorting coil wires can make a stepper motor very hard to
turn.

You can do a quick check with an ohm meter. Check the DC resistance between
the Pink-Orange terminals and the Yellow-Blue terminals. According to the
data sheet you should see about 50 ohms. Much more or much less than this
could mean they are ready for the rubbish bin.

Shane

On Tue, Jan 20, 2015 at 1:41 PM, Jeff Highsmith <jeff at jeffhighsmith.com>
wrote:

> Brian,
>
> Looking at the picture, I see the shaft is offset, meaning this is most
> likely a geared motor. Not all gear sets are "back-driveable", so the
> resistance to hand-turning may not be an indicator of the motor's condition.
>
> Jeff :)
>
>
> > On Jan 20, 2015, at 13:07, Grawburg <grawburg at myglnc.com> wrote:
> >
> > I have two 28BYJ48 5VDC stepper motors that I think are kaput. They are
> difficult to spin (unpowered) which I presume is not good. I expected them
> to turn freely much like a simple motor.  When I try to run them from my Pi
> (I have the controller and code) I can feel them trying to move.  Ready for
> the trash can?
> >
> >
> > Brian Grawburg
> >
> >
> >
> >
> >
> >
> >
> > _______________________________________________
> > Triangle, NC Embedded Computing mailing list
> > TriEmbed at triembed.org
> > http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
> > TriEmbed web site: http://TriEmbed.org
>
> _______________________________________________
> Triangle, NC Embedded Computing mailing list
> TriEmbed at triembed.org
> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
> TriEmbed web site: http://TriEmbed.org
>



-- 
A blog about some of my projects.  http://fettricks.blogspot.com/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20150120/be65c5ce/attachment.htm>