Subject:
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Re: Motor mis-match.
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 16 Jan 2001 17:17:36 GMT
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Original-From:
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SIMON_JENSEN-FELLOWS@AVID.stopspammersCOM
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Viewed:
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618 times
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Matthias wrote:
> Thank you! I'm glad to see someone has taken a semi-scientific
> approach to the whole question.
What's 'semi' about it ?
> It's doubtful that the Lego motors will heat up significantly enough
> to affect their operating speed.
I'm not sure that this is true. Firstly, the copper windings will become
poorer conductors as they heat up. And they will likely be the hottest
part of the motor. Secondly, thermal expansion may well increase the effect
of friction on the drive train.
> There is a more likely cause - the batteries. All batteries exhibit a
> recovery effect
Assuming that the batteries are relatively fresh, I doubt that there is
a significant refraction effect. Firstly the motor output is driven by a
microcontroller that does regulate the output. Secondly Steve's method
appears to eliminate this. In any case, this is easily eliminated by using
an AC adapter.
> ...and YES we do NEED stepper motors.....
I'll take those too...
-Simon
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