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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Wed, 17 Feb 1999 01:58:09 GMT
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Viewed:
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1338 times
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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 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
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Message has 2 Replies:
 | | Re: Motor power?
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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 (...) (26 years ago, 16-Feb-99, to lugnet.robotics)
| | | Re: Motor power?
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| (...) So is the old 8720(5114) motor more sensitive to the speed setting, due to its lack of a flywheel? Hao-yang Wang (26 years ago, 17-Feb-99, to lugnet.robotics)
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Message is in Reply To:
| | Motor power?
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| 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 (...) (26 years ago, 17-Feb-99, to lugnet.robotics)
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