Subject:
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Re: 0.5 degree resolution with rotation sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 3 Jun 2000 16:30:22 GMT
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Viewed:
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838 times
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Did you have any problem with the slack resulting from the gear train? With
so much gears the error generated slack should be greater than the
precision.
I don't have a rotation sensor yet but some assemblies I made in the past to
control sterring with touch sensors had this problem. i never solved it. :(
PS: Are you brazilian?
Mauro Vianna
"Moleque BR" <molequebr@cs.com> wrote in message
news:FvG6KM.L30@lugnet.com...
> Hi guys!
>
> I've been playing with a position controller and thought that could • interest
> someone else.
>
> Since the rotation sensor has only 16 counts for 1 full turn, which means • 22.5
> degrees, I thought about a way to get some more precision.
>
> In order to get a 1 degree precision, a 22.5:1 gear train would be • necessary,
> but then, why not a 45:1 gear train? That causes the input to turn 720 • times
> for each turn on the output, which gives a 0.5 degrees precision.
>
> Here is how I did it:
>
> input legend:
> | | axle
> [|] sensor # technic beam
> ###|##|##|###|#### * 8t gear
> # * *** | | # *** 24t gear
> # | * *** | # ***** 40t gear
> # | | * ***** #
> ###|##|##|###|####
> |
> output
>
> I hope that will interest you guys, 'cause I'm having fun! :o)
>
> Cheers
>
> Ricardo Andrade
> San Jose, CA
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Message has 1 Reply:
 | | Re: 0.5 degree resolution with rotation sensor
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| I don't really need it to be really precise, because, yes, the gear train is a huge factor in a situation like that. I only built the gear train and I'm using another rotation sensor as the reference for my controller. Depending on the position I (...) (25 years ago, 5-Jun-00, to lugnet.robotics)
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Message is in Reply To:
| | 0.5 degree resolution with rotation sensor
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| Hi guys! I've been playing with a position controller and thought that could interest someone else. Since the rotation sensor has only 16 counts for 1 full turn, which means 22.5 degrees, I thought about a way to get some more precision. In order to (...) (25 years ago, 31-May-00, to lugnet.robotics)
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