Subject:
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Re: compact designs
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 31 Jan 2002 21:33:50 GMT
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Viewed:
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1806 times
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In lugnet.technic, William Howard writes:
> > > Which 9v motor? The old version or the new version - the new version is
> > > geared 350:1 relative to the old version anyway.
> >
> > No way! Have a look at this:
> > http://web.mit.edu/sp.742/www/motor.html
>
> "I must check facts I have read before posting to newsgroups"
> ... repeat 98 times ...
> "I must check facts I have read before posting to newsgroups"
>
> I'd mis-remembered '350rpm' as '1:350 gearing' from the manual for the Motor
> Accessory set (8735, pg 9), and 350rpm is the 'official' lego number.
LOL, the 1:350 ratio really grabbed my attention when I first read it.
350 rpm sounds reasonable. The MIT link states a measured RPM of 375. I
guess it's very dependant on the input voltage.
> > If you can convince Steve Lane to give up details on his transmission
> > design, I think he can help ;-)
> Thought you were the one asking for help! ;-)
No, Jan-Tore Skålvik originated this thread. Of course I'm very interested
in the responses too. I'd like to know what other people think.
> > > However, your request sparked some interest in me, so I designed a system
> > > to achieve 1:2016 reduction
> >
> > Whoa. That's definitely gear-breaking torque.
> Wasn't brave enough to try it (have already spent way too much money on
> BrickLink this month without having to replace gears!)
>
> > Save an image file from MLCAD and post it on Brickshelf!
> These are the "stepped" build instructions as a DAT file
> http://www.brickshelf.com/gallery/whoward69/LDraw/2016_reduction.dat
>
> William
Hey, that's pretty compact. It's definitely a gear-munching machine.
But, if you had a need for high gear reduction with a very low torque output
it would work great.
TJ
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Message has 1 Reply:
 | | RE: compact designs
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| (...) output (...) When I first built it I couldn't actually see the final shaft turning - then i calculated the reduction and stuck a 1x3 lift arm on the end to check that nothing was actually slipping. You still need quite a lot of patience to see (...) (25 years ago, 1-Feb-02, to lugnet.technic)
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Message is in Reply To:
| | RE: compact designs
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| (...) ... repeat 98 times ... "I must check facts I have read before posting to newsgroups" I'd mis-remembered '350rpm' as '1:350 gearing' from the manual for the Motor Accessory set (8735, pg 9), and 350rpm is the 'official' lego number. (...) (...) (25 years ago, 31-Jan-02, to lugnet.technic)
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