Subject:
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RE: is it possible to make a motor with a limited range of travel?
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 18 Jun 2004 19:12:34 GMT
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Original-From:
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Rob Limbaugh <RLIMBAUGH@GREENFIELDGROUPantispam.COM>
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Viewed:
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1017 times
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> > Thats kinda usefull except that I dont have enough clutch gears,
> > touch sensors or sensor inputs on my RCX :(
>
> Or you may use poor man's clutch gear: pulleys and slipping rubber • belt.
> Or if
> your application does not need too much mechanical power, you can
> simply use a low power level on RCX output. With a power level 2 both
> the RCX and the motor can endure stalled condition for a long time.
Hello,
If you take a beam and put racks on it, you can push that across a gear
and it will make the gear spin. A back and forth motion causes back and
forth rotation on the gear. To get mechanical back and forth motion,
simply connect the rack arm to a wheel. For example:
________
,' ------------------------------------.
/ Drive -------------------------vvvvvvvvvvv' <---- Rack moves
left and right
| o | _/V\_
\ Wheel / > o < <---- Gear moves
forward and backward
'._______.' '/V\'
Another solution could be to build a race or oval track that a wheel can
fit in. For example:
........ Wheel
v
____________________________________________
.' _______________________O__________________ '.
( (__________________________________________) ) <--- Track
'.____________________________________________.'
You could always use a Peaucellier cell:
http://carol.wins.uva.nl/~leo/lego/peaucellier.html
There is another version of a Peaucellier-type cell that uses a
different configuration to convert rotary to linear motion. The page it
is on shows someone's kinetic sculpture exhibit(s). Perhaps someone
else knows of the page I'm referring to. It also had a sculpture using
worm gears--the point of which was that the gear reduction in the system
meant the end of the sculpture would turn once every several years or
so.
- Rob
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