Subject:
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Re: Rotational Sensor & Gearing Down
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 23 Jan 2001 22:32:47 GMT
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Viewed:
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687 times
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"Bob Fay" <rfay@we.mediaone.net> wrote in message
news:G7MKLo.2tB@lugnet.com...
> Rotation sensors will lose counts randomly in spite of the firmware.
I'll back that! It's totally hit-and-miss. I've done several tests on
different gearings (some running the thing off a micromotor...) and no
matter what, they *always* loose count. I'm really dissapointed with them,
and I've hardly used them for this exact reason. :(
Iain
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Message has 4 Replies:
 | | Re: Rotational Sensor & Gearing Down
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| In my experience, rotational sensors are accurate to within +/-5%. 100% accurate sensors would be great, but 95% accurate sensors are still very useful. You can compensate for the inaccuracy in various ways, e.g. in the software. IMHO, this is no (...) (23 years ago, 24-Jan-01, to lugnet.robotics)
| | | Re: Rotational Sensor & Gearing Down
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| (...) OK - time for the rigerous scientific approach here (well - OK - the half-assed semi-scientific Steve Baker method :-)... I'm typing this email as I run the tests...so right now, I don't know the answers... Test 1: Connect two rotation sensors (...) (23 years ago, 24-Jan-01, to lugnet.robotics)
| | | Re: Rotational Sensor & Gearing Down
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| (...) I think the PIC series of microcontrollers have some sample code for reading quadrature-type rotational sensors (a la mousewheels). Perhaps one could design a PIC-based intermediate module that was dedicated to reading rotational sensors (...) (23 years ago, 24-Jan-01, to lugnet.robotics)
| | | Re: Rotational Sensor & Gearing Down
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| (...) I just read the very interesting posting regarding testing the rotation sensor to evaluate the "missing counts" phenomenon. The above snippit would indicate that the rotation sensor is handled differently from other sensors. It isn't! It is (...) (23 years ago, 25-Jan-01, to lugnet.robotics)
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