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Hi all,
After a quite a bit of time, I have a new MOC ready.
Differtimento is my entry for the Planetery Society's Build a Better Rover
Contest
http://redrovergoestomars.org/mars-station_rovers.html
and mentioned here too
http://news.lugnet.com/technic/?n=9672
Differtimento is a skid-steer vehicle that incorporates a differential connected
to both both motors. When the motors turn in different directions, the wheelbase
of the vehicle changes its shape mechanically, which increase its turning
"efficiency" quite a bit. The vehicle also incorporates a very simple mechanical
device that ensures that both tracks move at exactly the same speed if they move
in the same direction - which is applicable to all skid-steering vehicles.
A more detailed explanation can be found at my site, along with an Ldraw file,
lots of renderings and step-by-step instructions to make one.
http://www.geocities.com/technicpuppy/
Photos
(After moderation)
http://www.brickshelf.com/cgi-bin/gallery.cgi?f=45847
Some highlights (Rubber bands should cross!)
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=422277
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=422280
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=422228
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=422233
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=422239
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=422237
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=422235
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=422236
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=422278
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=422282
Video (AVI Divx 4.1) can be found at
http://members.chello.nl/agarc/dftmovie.avi (~700k)
http://members.chello.nl/agarc/dftwhls.avi (~250k)
Well, there it is - I hope you enjoy it. Incidentally, I came up with all this
independently, but I would be surprised if it hasn't been done before. I will
most definitely continue working on it. Next step is to incorporate a Scout (2
motor ouputs) and make it a fully automatic platform that could provide mobility
to other RCX or Scout based mechanisms, as some functions - like re-aligning the
wheels after a turn - can be enhanced by computer control.
Cheers
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Message has 2 Replies:
 | | Re: MOC Differtimento
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| Hi Miguel, Very interesting conception, superb instructions! I need to try that one... (...) Good luck ;o) Philo www.philohome.com PS: (URL) and (URL) links are broken (the first should be baseins.html) (21 years ago, 9-Jun-03, to lugnet.technic, lugnet.technic, lugnet.cad)
| | | Re: MOC Differtimento
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| (...) Fantastic Miguel! I have been working a similar Rover concept for the last few months, although I must confess, that I have focused on the brute strength approach - with motors located at each wheel. My Rover is RCX controlled and has four (...) (21 years ago, 10-Jun-03, to lugnet.technic, lugnet.technic, lugnet.cad)
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