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 19:15:26 GMT
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Viewed:
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692 times
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"Moleque BR" <molequebr@cs.com> writes:
> 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.
Aren't you fooling yourself slightly here? Just because the input
turns 45 times for each turn of the output does not mean that the
precision of the output will be 45 times as good. What happens, for
example, if you reverse the input axle? The angle sensor will start
registering that the input axle turns the other way at once, while the
output will lag behind because of the gear train.
Fredrik
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Message has 1 Reply:
 | | Re: 0.5 degree resolution with rotation sensor
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| (...) Actually, I have built such a beast. Or rather, an even more precise beast- don't remember the exact gear setup, but it was roughly in the 625:1 range (4 sets of 8:40(?) gear combinations.) Slop was minimal- a harsh stop and reverse might lose (...) (24 years ago, 3-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 (...) (24 years ago, 31-May-00, to lugnet.robotics)
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