Subject:
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Re: Worm Drive Question
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 28 Nov 1998 02:29:44 GMT
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Reply-To:
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(lpien@ctp.iwantnospam.com)IHateSpam()
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Viewed:
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2400 times
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John Scott Kjellman wrote:
>
> Just to toss in my three cents (inflation adjusted to 1998 rates ;-)
>
> It seems there are two more options that might be a little easier:
>
> 1) My kids have gotten a couple of Lego sets that contain a long square
> shaft that has teeth on it. It mates to a large brick that contains a
> small gear attached to a shaft. If you insert the rod into the brick
> and turn the shaft the rod moves in/out (or up/down, depending on its
> orientation). This has a travel of about 8 inches.
This is an excellent solution for travel up to 7 inches or so, with a
couple of minor drawbacks.
1) This part doesn't seem to be in production any more. I got a few
copies, courtesy of Bill Katz, but had to trade away one joint of my
little finger to get them. (1) I think one of the big service station
sets uses them.
2) the force required to drive the pinion gear and make the rack move is
rather high, at least in the copies I have. (2)
Pitsco sells the 1x4 tile with top teeth in service packs. I think 10-14
tiles, and about 8 worms(3) per pack. That may be a feasible solution,
although it's definitely thicker and bulkier than the integral rack
brick KJohn talks of.
>
> Take care,
> KJohn
1 - well, not really, but you know what I mean.
2 - and I sure am not going to lube it with anything.
3 - more worms than you need, I think....
--
Larry Pieniazek http://my.voyager.net/lar
For me: No voyager e-mail please. All snail-mail to Ada, please.
- Posting Binaries to RTL causes flamage... Don't do it, please.
- Stick to the facts when posting about others, please.
- This is a family newsgroup, thanks.
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Message is in Reply To:
 | | Re: Worm Drive Question
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| Just to toss in my three cents (inflation adjusted to 1998 rates ;-) It seems there are two more options that might be a little easier: 1) My kids have gotten a couple of Lego sets that contain a long square shaft that has teeth on it. It mates to a (...) (26 years ago, 25-Nov-98, to lugnet.robotics)
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