Subject:
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Re: compact designs
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 31 Jan 2002 20:30:43 GMT
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Viewed:
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1749 times
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In lugnet.technic, William Howard writes:
> Which 9v motor? The old version or the new version - the new version is
> geared 350:1 relative to the old version anyway.
No way! Have a look at this:
http://web.mit.edu/sp.742/www/motor.html
The new geared 9v motor revolves at a ratio of 1:3.79 (approximate) of the
old 9v motor.
> We really need to know what kind of ratio is needed, how much torque it will
> have to sustain and how much space is actually available in order to come up
> with a practical design.
>
> The recent posts on Power Pullin' should highlight torque issues, while
> Jennifer Clark's excellent Compact Excavator drive train
> (http://www.telepresence.strath.ac.uk/jen/lego/js70_lrg/drivetrain2_lrg.htm)
> shows what can be accomplished in a very small space - note that gears are
> placed at both ends of the body and joined by long axles to enable bits of
> space to be used and not one contigous area.
If you can convince Steve Lane to give up details on his transmission
design, I think he can help ;-)
> However, your request sparked some interest in me, so I designed a system
> to achieve 1:2016 reduction
Whoa. That's definitely gear-breaking torque.
> in a (maximum)
> space 4 studs wide by 5 studs long by 4 beams high. The final drive is
> directly in line with the original motor output. However, I think the
> solution is completely impractical due to high friction, non-standard
> meshing of gears, and the use of the flimsy 14t single bevel gears - but it
> was fun! I have an LDraw/MLCad DAT file I can e-mail direct if you're
> interested
> (lugnet newsgroups won't accept LDraw files).
Save an image file from MLCAD and post it on Brickshelf!
TJ
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Message has 1 Reply:
 | | RE: compact designs
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| (...) ... repeat 98 times ... "I must check facts I have read before posting to newsgroups" I'd mis-remembered '350rpm' as '1:350 gearing' from the manual for the Motor Accessory set (8735, pg 9), and 350rpm is the 'official' lego number. (...) (...) (25 years ago, 31-Jan-02, to lugnet.technic)
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Message is in Reply To:
| | RE: compact designs
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| -----Original Message----- From: news-gateway@lugnet.com [mailto:news-gateway...net.com]On Behalf Of jan-tore Sent: 26 January 2002 01:43 (...) Which 9v motor? The old version or the new version - the new version is geared 350:1 relative to the old (...) (25 years ago, 31-Jan-02, to lugnet.technic)
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