Subject:
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Re: Discontinuous motion.
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 3 Apr 2002 18:08:37 GMT
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Original-From:
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Steve Baker <sjbaker1@airmail%stopspam%.net>
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Reply-To:
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SJBAKER1@AIRMAILantispam.NET
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Viewed:
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589 times
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"Kevin L. Clague" wrote:
> You can do this without modifying any gears.
>
> To approximate a gear with teeth missing, all you need to do is have
> the axle that drives the gear offset from the center of the gear.
>
> For example on a 40T gear, just use one of the axle holes that is
> not in the center of the gear.
I've tried that - it jams periodically when the teeth of one wheel
meet point-to-point against the teeth of the wheel it's driving.
This seems to be because of the strange angle at which the first
wheel approaches the second at it initially meshes.
HOWEVER: I have finally found a mechanism that works:
http://www.sjbaker.org/steve/lego/discontinuous.html
...but it's still not really *precise*.
----------------------------- Steve Baker -------------------------------
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Message has 2 Replies:
 | | Re: Discontinuous motion.
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| Nice work! Could you potentially use a ratchet mechanism or maybe a step motor set up (with a rubber band) to help with the "coating" problem? Jona ----- Original Message ----- From: "Steve Baker" <sjbaker1@airmail.net> To: "Kevin L. Clague" (...) (22 years ago, 4-Apr-02, to lugnet.robotics)
| | | Re: Discontinuous motion.
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| Steve, If the precision is due to the axe slipping while not being driven, you could consider using a pully off a micro-motor. It has a friction slip mechanism at one end, and an axle hole at the other. You could use the axle hole to stablize the (...) (22 years ago, 4-Apr-02, to lugnet.robotics)
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Message is in Reply To:
| | Re: Discontinuous motion.
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| "Steve Baker" <lego-robotics@crynwr.com> wrote in message news:3CAA6B95.CB1986...ail.net... (...) (A) (...) you (...) rotating (...) You can do this without modifying any gears. To approximate a gear with teeth missing, all you need to do is have (...) (22 years ago, 3-Apr-02, to lugnet.robotics)
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