Subject:
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Re: micro motor jam
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 13 Apr 2000 17:41:46 GMT
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Viewed:
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709 times
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Ralph Hempel wrote:
> ...Ther is
> a little thermal cutoff that you can actually hear clicking when
> the motor is overloaded. It might take a few seconds to reset.
>
>
When I took a jammed micromotor apart, I could not find any thermal
cutoff circuitry at all. What I did find was that the internal gears
use very small teeth, but there was enough freeplay in the gears'
rotational axis that it was easy to get the gears misaligned (therefore
jamming them). I guess LEGO had to make a compromise between small size
and reliability.
--
Cheers,
Henry C.
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Message has 1 Reply:
 | | Re: micro motor jam
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| (...) gears (...) I haven't taken my micromotor all the way apart, just popped the face off. But from my cursory investigation it appears that the micromotors use an unusual arrangement of gears, which I think is called a planetary gear. As far as (...) (25 years ago, 16-Apr-00, to lugnet.technic)
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Message is in Reply To:
| | RE: micro motor jam
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| (...) Yep. It's a common problem. I have 3 of them and they all tend to fail this way. Be careful that you don't actually JAM the motor. Ther is a little thermal cutoff that you can actually hear clicking when the motor is overloaded. It might take (...) (25 years ago, 13-Apr-00, to lugnet.technic)
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