Subject:
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Re: Length of Diagonal Spreadsheet
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 8 Apr 2001 00:18:13 GMT
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Original-From:
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Steve Baker <SJBAKER1@nomorespamAIRMAIL.NET>
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Reply-To:
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sjbaker1@airmail%Spamcake%.net
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Viewed:
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434 times
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Gustav Jansson wrote:
>
> I just created a spreadsheet that I think will be useful to many of us. It
> shows the lengths of possible diagonals in terms of LEGO Units.
For gear spacings, you might try:
http://web2.airmail.net/sjbaker1/lego/gearpairs.html
> My testing shows that errors as great as 5% are usually no problem for
> gears.
That *can't* be right. The tolerable error for two 40t gears is no
different from the error for two 8t gears - so it's certainly NOT a
percentage of the distance between axle centers.
I checked this quite carefully and I believe that an error of one
tenth of a 'stud' either side of the ideal distance is tolerable.
Hence having your table round to the nearest quarter of a stud makes
them useful than they could be for this kind of thing.
That's why my gear meshing tables simply list all possible combinations
(there really aren't all that many)....although I didn't test for half-stud
horizontal spacings (I'll add that the next time I re-do it).
You mention a "new 12t gear" - I've never seen one of those - but since
I generated my gear tables with a computer program it wouldn't be at
all difficult to add it. Which set(s) have this new part?
--
Steve Baker HomeEmail: <sjbaker1@airmail.net>
WorkEmail: <sjbaker@link.com>
HomePage : http://web2.airmail.net/sjbaker1
Projects : http://plib.sourceforge.net
http://tuxaqfh.sourceforge.net
http://tuxkart.sourceforge.net
http://prettypoly.sourceforge.net
http://freeglut.sourceforge.net
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Message has 2 Replies:
 | | Re: Length of Diagonal Spreadsheet
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| (...) I'm assuming he's talking about the 12T double bevel gear. Three sets that I know of that have them are the DDK, the Technic 8448 Super Street Sensation and the Technic 8008 Stormtrooper. They have a standard 3L mesh spacing when used with a (...) (23 years ago, 8-Apr-01, to lugnet.robotics)
| | | Re: Length of Diagonal Spreadsheet
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| (...) Thanks for the link to your gear spacing site. That is sort of what I was looking for though in my chart I aimed at being more general then just a list of workable gear spacing. My diagonal measurements can also be used to find workable beam (...) (23 years ago, 8-Apr-01, to lugnet.robotics)
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