Subject:
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Re: Received my RIS 2.0 - the two motors run at different speed! :-(((
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 12 Jan 2003 11:25:12 GMT
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Viewed:
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1315 times
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> So, the ratio of the distances travelled by the two wheels is is
> 2xPIx5.15 : 2xPIx5 ...which is... 5.15:5 ...which is... 1.03:1... which
> represents a 3% difference in motor speeds. Which is fairly typical
> for any pair of motors picked at random.
>
> CONCLUSIONS:
> ~~~~~~~~~~~~
>
> You have a nicely matched set of motors. Your next set *could* be four
> times as bad...some of my motors differ by 11% !
>
> Keep them! Treasure them! Show your geek friends what *great* motor
> matching you have!
Once again, thanks for making all the calculations for me...
Anyway, at the very least, I'll test all four of my other regular gear
motors in a mindstorms robot. If I'm lucky to find a pair that are of equal
speed, I'll use them in my mindstorms kit instead... at the expense of
slightly heavier robots.
And I did read the motor comparison analysis posted a few weeks ago, that
was a *very* interesting read, if I remember correctly the regular geared
motors are slightly stronger than the mindstorms motor, on average.
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