Subject:
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RE: I wish Lego made an "Anti-Backlash Gear"
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 6 Apr 2001 00:51:22 GMT
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Original-From:
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Tilman Sporkert <TILMAN@WEBMETHODS.nomorespamCOM>
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Viewed:
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8804 times
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> It's really hard for me to fault Lego for the sloppy mesh of their gears.
> Not when you consider their per unit price. I imagine that some
> of the slop
> is intentional for purposes of reducing friction. We are working
> with puny
> little motors after all. If you wan't to limit backlash, just use the big
> gears and remember it is a building "toy".
It's not the unit price, but the primary motivation for Lego products: It's
a toy for kids. Yes, it has found some applications in education and amateur
robotics, but it's still a toy. To build exact mechanisms, you not only have
to deal with gear backlash, but also with joiners that have play (or
wiggle), and axles that can be twisted and bend easily. Take the Silver
Champion Technic set for example. Hold one front wheel tight, and see how
far you can turn the other one. Without using too much force, you can turn
it 45 degrees! You can also tilt it at least 20 degrees! It doesn't really
need a suspension!
There are construction systems out there that are much better suited for
mechanical constructions. Fishertechnik is an example. The Mondo-tronics's
Robot Store (http://www.robotstore.com) carries some sets in the U.S.
Fischertechnik uses solid metal axles, and in general is much stronger, with
no flexing and bending. But Fischertechnik doesn't have the large market
share that Lego enjoys, and therefore, it's much more expensive. And there
are no mini-figs, Silver Champions, cool trains, etc. Go to
http://www.fischertechnik.de for full details. The site has a checkbox to
switch to English.
Tilman
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Message has 1 Reply:
 | | Re: I wish Lego made an "Anti-Backlash Gear"
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| Listen guys, I'm not playing around with a "Building toy" here, look, (URL) working - creating on this scale, you begin to demand the highest preformance from all aspects of Lego. Eric "Legomaster" Sophie (...) (24 years ago, 6-Apr-01, to lugnet.robotics)
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