Subject:
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Re: odometry (was Re: Homing with the IR Tower)
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 31 Jul 1999 06:43:14 GMT
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Viewed:
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1201 times
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I haven't done any 'bot yet but I have been thinking about this
problem. and here's the result:
it looks like the good free wheel should do its 'wheeling' equally
well in each direction. therefore it should be a ball. the design should
look like this:
@@
@ __ @
@ / \ @
@| |@
\__/
(you have to have non-proprotional font for this ascii art to make any
sense).
now rotate the picture about the vertical symetry axis and you have a
ball (\/|_ chars) and the 'holder' (@).
there should be something between the holder and the ball so that the
ball can rotate freely (few wheels would do the trick).
if did was not clear enough - it is something like a computer mouse
ball, only it is supported, not hanging (so it is where the mouse ball
is but it is of the same construction as trackball ball).
I do not have much experience with lego (only have mindstorm set and
haven't done much with it, mostly thought experiments so far).
what do you guys think? I haven't seen such a design yet - is there
anything similar out there? (I am talking lego realm, of course)
erik
Laurentino Martins wrote:
...
> It was not good at anything, not even for straight paths because slight oscillations in the free wheel direction had a great impact on the direction of the vehicle.
>
> Here's my free wheel:
>
> vehicle
> _________
> #
> OOOO #
> OO OO #
> O #####
> OO OO
> OOOO
>
>
> I need to find a better design...
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Message has 2 Replies:
Message is in Reply To:
 | | Re: odometry (was Re: Homing with the IR Tower)
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| At 09:20 28-07-1999 Wednesday , Mario Ferrari wrote: [snip] (...) I've downloaded, printed and read it all some time ago :-) (...) I've used 2 wheels instead of tracks once, and the results where terrible compared with tracks. The problem was that (...) (25 years ago, 28-Jul-99, to lugnet.robotics)
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