Subject:
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Re: Any experience with measuring rotations?
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Newsgroups:
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lugnet.robotics.nxt
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Date:
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Sat, 20 Jan 2007 20:20:22 GMT
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Viewed:
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10786 times
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In lugnet.robotics.nxt, Rafe Donahue wrote:
> Hi all,
>
> I am working on a "project" where I want to measure some reasonably small
> rotations, things on the order of +/- 10 degrees or less. Just to make it hard,
> the force acting on the thing being rotated is small, like, completely
> hypothetically, the mass of, say, a Lego soccer ball on the end of a 16-stud
> beam. So, imagine I have, say, a 32-stud length teeter-totter (You know, I
> don't think I've ever typed that word before!) and at the fulcrum I have an axle
> and I place a ball at the end so that the teeter-totter (there it is again)
> tilts. I want to measure the rotation.
>
> I tried using one of the NXT motors but it takes too much force to move the
> axle. If I increase the force (torque?) through gearing it up (down?) then
> there is too much slippage, the gears are too loose, and it doesn't register.
>
> So, I guess I need a force sensor, ie, an NXT scale, but something more than
> just the binary on/off of a (not sensitive enough) touch sensor.
>
> Any thoughts?
>
> Thank you,
> Rafe
I am not really an NXT guru, but seems the best way would be to simply measure
the distance and calculate the angle.
Tommy Armstrong
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Message has 1 Reply:
Message is in Reply To:
 | | Any experience with measuring rotations?
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| Hi all, I am working on a "project" where I want to measure some reasonably small rotations, things on the order of +/- 10 degrees or less. Just to make it hard, the force acting on the thing being rotated is small, like, completely hypothetically, (...) (17 years ago, 20-Jan-07, to lugnet.robotics.nxt)
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