Subject:
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Re: Re: broken motor, how to take apart?
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 21 Jan 2002 22:15:55 GMT
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Original-From:
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Rob Limbaugh <RLIMBAUGH@UREACHstopspammers.COM>
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Reply-To:
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<[rlimbaugh@]AntiSpam[ureach.com]>
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Viewed:
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820 times
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I've never had one of these motors, so I don't know what's
inside. However, I used to rebuild starter motors for vehicles
and a problem like this was usually associated to solidified
grease, especially in gear reduction motors.
We used to set the motors up in front of a heat source to warm
up the grease to see if the motor would even work electrically
before we tore it all apart.
Hope this helps...
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---- On Mon, 21 Jan 2002, John Barnes (barnes@sensors.com)
wrote:
> This general subject has been discussed here before. I'm sure • you can
> search
> the lugnet archives for more info.
>
> However, as my supply of motors has aged, I too have noted • that they do
> tend
> to seize or at least stiffen up with lack of use.
>
> I have rejuvinated a few in that state by momentarily • applying 9 - 10
> volts
> from a fairly stiff source like a lab power supply. If you • apply power
> in
> the forward and then reverse direction a few times, you may • well find
> you
> can "jerk" the motor back to life.
>
> The really bad thing to do is to atemppt to force it by • turning the
> shaft.
> The internal gearing up is so extreme, that in all • likelyhood, you will
> irrepairably damage something. It is much better to try and • free the
> gear
> train from within!
>
> JB
>
> In lugnet.robotics, Mike Barrett writes:
> > Not sure if this is the right group...anyway
> > Just got back into Lego robot and rebuilt one of my bots. • But one of
> the
> > motors has become very tight, will just about turn. The • motor was left
> > unused for a bout 9 months in a dry room so not sure what • has happened
> to
> > it. As it came from my RIS set (brought when they first came • out) I
> guess
> > its not under guarantee any more.
> > I would like to find out what it wrong with it so has anyone • taken one
> > apart? If so how?
> > thanks
> > mike barrett • robotics
>
>
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