Subject:
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RE: gear differential
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 19 Nov 1998 22:20:04 GMT
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Original-From:
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Medical Informatics Consulting <MEDINFO@avoidspamAROS.NET>
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Viewed:
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1950 times
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On Fri, 20 Nov 1998, Tim McSweeney wrote:
> Yeah I had thought of that but the problem is you need one motor to do the
> driving and one motor to do the switching, The way the gearbox is presented
> in the model only This only gets you two outputs,, so you haven't gained
> anything, in fact you've lost compared to just using the motors because you
> can't drive them both at the same time. If you add a second motor to do
> more complex switching (I really need a scan of the model to show you (help
> anyone?)) you get FOUR outputs from three motors. But you can still only
> drive one at a time. This is OK for some models, but not far anything like a
> mobile Tank that needs both tracks running at the same time.
>
> Of course the solution is to design a better gearbox than the one from Lego,
> but that can get tricky :)
>
> On a side note, a Differential can be used to produce two ONE-WAY outputs
> from a single motor just put opposing ratchets on either side of the
> differential. Turn the motor one way and the left ratchet locks up turn it
> the other and the right ratchet locks up.
>
>
> Cheers
> Tim
>
>
check out http://carol.wins.uva.nl/~leo/lego/diff.html for a nice device
for controlling a tracked vehicle. I've modified it slightly to flatten
it a layer and use a micromotor for the steering and a one of the motors
from the Mindstorms set (a mini motor) for the power. Two mini motors
could be used, but it makes the steering more touchy.
Look at the rest of Leo's stuff too. Very interesting.
Matt S.
medinfo@aros.net
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Message has 1 Reply:
 | | RE: gear differential
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| (...) this is a fantastic device. i played with it today and build a new robot platform using it. i also flattened it by one layer, and i also make it one element wider (to make its width an even number, which makes it easier to work with). the main (...) (26 years ago, 20-Nov-98, to lugnet.robotics)
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Message is in Reply To:
| | RE: gear differential
|
| Yeah I had thought of that but the problem is you need one motor to do the driving and one motor to do the switching, The way the gearbox is presented in the model only This only gets you two outputs,, so you haven't gained anything, in fact you've (...) (26 years ago, 19-Nov-98, to lugnet.robotics)
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