Subject:
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Re: What is RPM of Gear Motor???
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 14 Jul 1999 02:15:42 GMT
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Viewed:
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992 times
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In article
<Pine.SOL.3.91.990713192426.1673B-100000@teer13.acpub.duke.edu>, Luis
Villa <liv@duke.edu> wrote:
> On Tue, 13 Jul 1999, Dave Baum wrote:
> >
> > 650 ticks per second works out to about 1.5 ms per tick. I didn't think
> > the RCX sampled inputs that fast - I thought it was 3.0 ms per sample. If
> > so, this would mean that the RCX is capable of adding 2 to the rotation
> > value during a single sample.
>
> Nope-it's not. I use LegOS, and that only adds 1- I know that particular
> section of code inside and out. Therefore, it must be the sampling time.
> Or a really egregious error on my part.
I don't know anything about legOS - perhaps it has its own sensor sampling
code. I was looking through the standard Lego firmware to determine the
1250 rpm number, and I verified it with a few experiments, but again using
standard firmware.
Dave
--
reply to: dbaum at enteract dot com
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Message has 1 Reply:
 | | Re: What is RPM of Gear Motor???
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| (...) Ah! I thought the 3 ms you were referring to was a function of the hardware, not the software- I thought it might have something to do with the A-to-D in the chip. FYI, in legOS, the rotation sensor can technically be sampled as often as the (...) (25 years ago, 14-Jul-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: What is RPM of Gear Motor???
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| (...) Nope-it's not. I use LegOS, and that only adds 1- I know that particular section of code inside and out. Therefore, it must be the sampling time. Or a really egregious error on my part. (...) <snips much code> (...) Yes, but at this speed, you (...) (25 years ago, 13-Jul-99, to lugnet.robotics)
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