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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Sun, 16 Apr 2000 20:40:07 GMT
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Viewed:
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910 times
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Philip Ogston wrote:
> 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 I
> know, the freeplay is actually intentional...
Yeah, I think they should be called planetary gears too, but I am just
about as sure as you are... The gears are supposed to move in a certain
fashion, but their fit is so loose that it is easy for the teeth of the
gears to step on top of each other if they have any force opposing the
rotation, such as from stalling the motor. The teeth are also so small
that making them out of plastic isn't a good idea IMO, as I can see the
teeth stripping off easily. Overall, to pack that much torque in such a
small housing is a work of art.
I agree that the addition of planetary gears to the LEGO regimen would
be cool. I would also like to see a compact design for a quaiffe limited
slip differential and a good design for an automobile clutch...
Building these into my new car project (honda nsx) has proved challenging...
--
Cheers,
Henry C.
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Message has 1 Reply:
 | | Re: micro motor jam
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| (...) Nope, I'm wrong. Turns out a planetary gear arrangement is a sort of coaxial non-reversing gear reduction thingy good for high torque applications and resistant to skipping... um, well there's a diagram of one at (URL) near the bottom of the (...) (25 years ago, 18-Apr-00, to lugnet.technic)
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Message is in Reply To:
| | 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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