Subject:
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Re: Mechanical pneumatic piston
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 10 Oct 2003 14:26:57 GMT
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Viewed:
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1755 times
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In lugnet.robotics, Mike Thorn wrote:
> > Steve Baker articulated the following piece of wisdom in his post at 12:24
> > AM 10/10/2003:
> >
> > The end of the helix on one worm gear lines up exactly with the start
> > of the helix on a second worm gear. If the gears were a quarter stud
> > longer, they wouldn't have this useful property unless Lego also changed
> > the pitch of the helix.
>
> I'm not sure I agree with that. It seems to me that if you made these worms
> from one great long string, all you need to do is cut them wherever you
> want a new one. The helii (is that a word?) would still line up. I don't
> see why they couldn't just "cut them" an unth longer.
The problem is that you would need a mold for each unique part that is cut. If
the number of rotations/divided by the length does not give you length that is
repeatable using quarter turns you need more than one mold. This is *not* good
(very expensive), plus from a part sorting perspective, I'd need more than one
drawer for worm gears :^)
I'm sure that LEGO put a lot of thought into the worm gear before they made the
mold.
One interesting question is, can you stack up enough worm gears so that the
slack adds up to an integer multiple of 1/2 stud distances. This might be a good
thing for this linear screw actuator. I'll have to check that out when I get
home.
Very interesting discussion.
>
> ~Mike
Kevin
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Message has 1 Reply:
 | | Re: Mechanical pneumatic piston
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| At 10:26 AM 10/10/2003, Kevin Clague uttered the following: (...) I'm not sure my brain can wrap itself around that, but I'll keep trying. In the meantime, I'll take your word for it that it won't work. :) Sometimes you LUGNET fellows are a little (...) (21 years ago, 11-Oct-03, to lugnet.robotics)
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Message is in Reply To:
| | Re: Mechanical pneumatic piston
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| (...) I'm not sure I agree with that. It seems to me that if you made these worms from one great long string, all you need to do is cut them wherever you want a new one. The helii (is that a word?) would still line up. I don't see why they couldn't (...) (21 years ago, 10-Oct-03, to lugnet.robotics)
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