Subject:
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Re: Strong gear assemble?
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 22 Sep 2000 18:42:50 GMT
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Viewed:
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819 times
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Im ahead of you there, I already did that :p. I need to add even more torque. The the
current setup is this: worm to central 40pt gear, 40pt's axle is connected to one 8pt
gear on either end and then after that a 16 (i think)on each end also. The 8's are
meshed with a 40 each, the two 16pt each mesh with another 16pt. These 16 each have a 8
on the same axle, and the 8's turn the other two 40pt. total 5 40s, 4 8s, 4 16s, 1
worm. the whole setup is almost completly semetrical both directions. Finaly the 4
outer 40s are connected to a big wheel frame each (minus the tire) the white ones with
6 places, plus center, for attaching stuff.
Jason
P.s. whats the worm to 40pt ratio?
Jennifer Clark wrote:
> Jason Stern wrote:
>
> > Same when it goes back down. I do need to add one
> > more worm gear, right now it lifts everything but the rcx (very close though),
> > so it needs a little more torque.
>
> A word of caution - the worm gears are certainly great for large gear reductions in
> small spaces, and it is usually easy to brace them well, but they have one
> disadvantage over a traditional gear train - they create more friction, and are
> therefore less efficient in this regard. If all you need is just a little more
> torque, you may be better off using, say, an 8 tooth into a 24 tooth gear for a 1:3
> reduction instead of another worm screw.
>
> Any thoughts on whether a normal gear train should be placed before or after the
> worm screw? Intuition tells me that it would be best before, so that the worm screw
> would be spinning more slowly, and therefore subject to less friction. On the other
> hand, the torque put on the worm screw by the load and motor in this situation
> would be greater, which could in turn create more friction. All this assumes that
> you have the choice of fitting the gears in the model in either combination, of
> course.
>
> Jennifer Clark
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Message has 2 Replies:
 | | Re: Strong gear assemble?
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| (...) 1:40. There's a single thread on the worm, moving one "tooth" per revolution. That gives you the same ration as 1 tooth gear. As has been discussed before, the characteristics of this worm gear reduction will be slightly different than (...) (24 years ago, 22-Sep-00, to lugnet.robotics)
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Message is in Reply To:
| | Re: Strong gear assemble?
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| (...) A word of caution - the worm gears are certainly great for large gear reductions in small spaces, and it is usually easy to brace them well, but they have one disadvantage over a traditional gear train - they create more friction, and are (...) (24 years ago, 22-Sep-00, to lugnet.robotics)
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