Subject:
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Re: Motor power?
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 16 Feb 1999 10:00:18 GMT
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Original-From:
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John A. Donaldson <jdonaldson@ghg&Spamcake&.net>
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Viewed:
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1321 times
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I have a tracked bot and I can notice the difference in speed when I set the
motors to 1 or 4 or 8.
John A. Donaldson
Dave Baum wrote:
> The firmware does do PWM. One reason you aren't seeing much difference is
> that the motor has an internal flywheel. When the pulse is "on", the
> motor revs up to speed, then this speed is maintained by the flywheel
> during the "off" pulse. If you put a bigger load on the motor (i.e. have
> it move something heavy), you'll start to notice some difference in the
> power settings. It still isn't great, but at least there is some
> difference.
>
> Dave
>
> In article <36CA1856.CCCDC250@seanet.com>, Dan McCabe <danm@seanet.com> wrote:
>
> > When I set the motor power (both in RIS and nqc), I expected the speed
> > of the motor to be proportional to the power setting (i.e., higher power
> > setting makes motor turn faster and vice versa). However, what I see is
> > that the power setting appears to have no impact on motor speed.
> >
> > Am I doing something wrong? Or is it just that I can't get there from
> > here? Any insights would be appreciated. (Yeah, I could do the PWM thing
> > in RCX code, but I hoped that the firmware did that sort of thing for
> > you; it would be faster and more efficient in firmware).
> >
> > TIA
> >
> > Cheers,
> > danm
>
> --
> reply to: dbaum at enteract dot com
> --
> Did you check the web site first?: http://www.crynwr.com/lego-robotics
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 1 Reply:
 | | Re: Motor power?
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| Thanks to all for responding. The event that spurred me to ask the question in the first place is that I wanted to use differential power settings to turn (steer) a tracked robot. Unfortunately, this appear to have no effect on the robot's ability (...) (26 years ago, 18-Feb-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: Motor power?
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| The firmware does do PWM. One reason you aren't seeing much difference is that the motor has an internal flywheel. When the pulse is "on", the motor revs up to speed, then this speed is maintained by the flywheel during the "off" pulse. If you put a (...) (26 years ago, 17-Feb-99, to lugnet.robotics)
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