Subject:
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Re: Lego® Technic Motor (43362) internals
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Newsgroups:
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lugnet.robotics, lugnet.technic
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Date:
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Sun, 15 Dec 2002 09:25:00 GMT
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Viewed:
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7299 times
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In lugnet.robotics, Philippe Hurbain writes:
> Hi Tobbe,
>
> My guess is that your friend actually got one 43362 and one 71427, the
> latter beeing enclosed in a 43362 case. If you look at 43362 enclosure photo
> (http://www.philohome.com/motors/case.jpg), you see that there are 4 plastic
> pins in corners that are used to secure 71427 core to the box. So Lego can
> use the same case for two different products ! The proof to that: the two
> black holes on back are missing from the freely running motor while they are
> required to hold the brushes of 43362 core motor.
Ah!
> This is not a good thing for your friend : the weight of these motors is
> somewhat different (28g vs 42g), 43362 rotates slightly slowlier and stops
> sooner. This probably render a simple differential drive equipped with both
> motor types almost unusable (needs to be tested though !)
My friend wont bother much since the boxes are for education at hiw workplace.
I conducted a quick test with one 71427-002 and one 43362 (with new internals),
put them back to back with a 8462 wheel on each axel and a 9V small battery box
being pused in front of them. A _very_ simpel dif. vehicle. As suspected the
vehicle wont drive in a straight line and it's the new motor that lags behind
causing the vehicle to turn. It's not a very tight turn though. The path
describes an arc, like a ')' being 6.7 meters "high" and 1 m wide. Don't know
the math to turn this into a turning radius. Perhaps I should have used gearing
to make the difference between the two motors more visible.
It feels like this is not a big difference though, I bet two of the old motors
would have done about the same arc...
/Tobbe
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Message has 1 Reply:
 | | Re: LegoX Technic Motor (43362) internals
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| (...) It's 6.11125 meters. (...) Yes - it's hard to tell because the difference in speeds will depend on the load on the motors - loading them either more or less would alter their characteristics relative to each other. (...) Yes - I think so. (...) (21 years ago, 15-Dec-02, to lugnet.robotics)
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Message is in Reply To:
| | Re: Lego® Technic Motor (43362) internals
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| Hi Tobbe, My guess is that your friend actually got one 43362 and one 71427, the latter beeing enclosed in a 43362 case. If you look at 43362 enclosure photo ((URL) you see that there are 4 plastic pins in corners that are used to secure 71427 core (...) (21 years ago, 15-Dec-02, to lugnet.robotics, lugnet.technic)
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