Subject:
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Re: Struggling with encoder wheel
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 12 Apr 2001 13:52:06 GMT
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Viewed:
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1075 times
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> I also still have problems getting semi-accurate reads. As the wheel
> turns and the sensor sits between two different colors, it tends to
> see it as a different gray and misreads.
I was wondering how you were handling the edge conditions. Have you tried
making a wheel which is a continuous gradiant from black to white over the
360 degrees of rotation? Lookup wouldn't be required as there would be a
direct relationship between the sensor reading and the encoder wheel position.
Another idea would be to go back to your incremental encoder wheel with the
black and white stripes and to add a home switch.
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Message has 1 Reply:
 | | Re: Struggling with encoder wheel
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| (...) The light sensor just doesn't have that kind of resolution. I'd never get a very accurate position by doing that, I wanted a finer positioning system than I can get from using a rotation sensor. I'm trying to build something that's got (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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Message is in Reply To:
| | Re: Struggling with encoder wheel
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| (...) If I had room for a 64 element array, I'd just use that and make a lookup table. Unfortunately I don't, and I can't figure out a way to pack things in and still look them up with any speed. I also can't find any way to mathematically convert (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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