Subject:
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Re: Recipricating motion problems
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 30 Nov 2000 17:01:41 GMT
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Viewed:
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850 times
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sorry but you lost me, whats a cam? If you mean an off center 40 tooth gear, i
already tried that but it didn't work. i could get it to turn th other , but i
could get it to turn it back again
Jason
Bob Fay wrote:
> You need gears or a cam that allows an adjustment in the distance from the
> centerline of the shaft. A 24 tooth gear and a 40 tooth gear would allow you
> to accomplish such action. I find the cam is very useful as the driven
> element. You can always place a cam on the shaft with the reciprocating
> gear to allow some further adjustment.
>
> --
> Bob Fay
> rfay@we.mediaone.net
>
> The Shop
> http://www.geocities.com/Heartland/Bluffs/7900/
> http://users5.50megs.com/bobfay
> California
> USA
> "Jason Stern" <2busytobe@home.com> wrote in message
> news:3A265EF8.A88E7AE0@home.com...
> > I have two 24 tooth gears. The lower gear is one hole down, six holes
> > over from the upper gear. Like so (the @ are where the center of the
> > gears are):
> >
> > @
> > @*****
> > ^1 2^
> > I need to make it so that by turning gear 1 continusaly, in only one
> > direction, gear 2 turns a 1/4 turn, and the goes back to the starting
> > position (ie gear 2 turns 90 degrees clockwise, then turns 90 degrees
> > counterclockwise. it can not turn back through use of a rubber band, the
> > rotating must come soley from gear 1, which is turning in only one
> > direction) How could I go about doing this? What I have been trying so
> > far is to use an axle like those on a train, with one end of the axle
> > attach to one of the holes in gear 1 and the other end attached to one
> > of the holes in gear 2. So far i have gotten gear 2 to rotate 45 and
> > back and i have gotten it to rotate more than 90, but not back (not sure
> > by how much it over rotated, after 90, the gear hits stuff and can't
> > rotate anymore, so it stops moving, and stops gear 1 from moving,
> > grinding everything to a halt) I have only tried a few combinations of
> > axles and connectors with the gears, but rather than go through all of
> > them (there must be at least a hundred!), has anyone done this before
> > and gotten it to work? Does anyone have any other suggestions how i
> > could do this?
> >
> > Jason
> >
> > P.S. If this confuses you, I have an mlcad that shows how it is supposed
> > to work. Drop me a line and I'll send it to you.
> >
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Message has 1 Reply:
 | | Re: Recipricating motion problems
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| This is a little short of 90 degrees. (URL) Fay rfay@we.mediaone.net The Shop (URL) Stern" <2busytobe@home.com> wrote in message news:3A2687F4.B93568...ome.com... (...) gear, i (...) but i (...) the (...) you (...) the (...) sure (...) supposed (...) (24 years ago, 30-Nov-00, to lugnet.robotics)
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Message is in Reply To:
| | Re: Recipricating motion problems
|
| You need gears or a cam that allows an adjustment in the distance from the centerline of the shaft. A 24 tooth gear and a 40 tooth gear would allow you to accomplish such action. I find the cam is very useful as the driven element. You can always (...) (24 years ago, 30-Nov-00, to lugnet.robotics)
|
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