Subject:
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Re: Motor speed
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 22 Nov 2002 14:44:59 GMT
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Original-From:
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Brass Tilde <brasstilde@insightbb!NoSpam!.com>
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Viewed:
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936 times
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> > the two motors appear to operate at slightly different speeds.
> > Is this something that is usual?
>
> Yes.
I figgered that was the case. <sigh>
> If you are using multiple motors to drive a small robot one
> way to compensate is with rotation sensors, or use a single
> motor and a differential to get the robot to drive straight.
> Or maybe use multiple motors and a differentially-driven
> single rotation sensor to detect the difference in the two
> motor speeds.
At the moment, it doesn't interfere with anything, as I am just starting to
build things and am just now building the roverbot and going through the
various "challenges". I'll keep those in mind though, for when I understand
everything you're talking about. <g/> I am a programmer by trade, so the
physical relationships between the parts are more arcane and challenging for
me than the programming aspects.
Maybe I'll get the kids to explain it to me...
Is the power adjustment fine enough to compensate for this sort of thing?
Setting one motor to 7 and the other to 8 or something?
Thanks,
Brad
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Message has 2 Replies:
 | | Re: Motor speed
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| (...) Trying to adjust the power settings probably won't work - not only do the motors vary slightly, but also their performance varies with the battery life. But with Mindstorms there are usually several different ways of overcoming any particular (...) (22 years ago, 22-Nov-02, to lugnet.robotics)
| | | Re: Motor speed
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| (...) Even if it wasn't the case, robots don't drive straight because of small differences in how you build one side of the robot compared to the other (eg the collars might be squeezed more tightly onto a beam on one motor than on the other)...also (...) (22 years ago, 22-Nov-02, to lugnet.robotics)
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Message is in Reply To:
| | Re: Motor speed
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| Quoting Brass Tilde <brasstilde@insightbb.com>: (...) Yes. If you are using multiple motors to drive a small robot one way to compensate is with rotation sensors, or use a single motor and a differential to get the robot to drive straight. Or maybe (...) (22 years ago, 22-Nov-02, to lugnet.robotics)
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