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  1. #1
    Join Date
    May 2004
    Posts
    290

    Reinventing the wheel

    I just saw this on T.V. tonight. All I can say is WOW.

    http://www.airtrax.com/flash/sidewin...eo_viewer.html

    There's some serious hardware/software running in the background to allow for this kind of movement (all in real time).

    They say it took 10 years to develop. It was developed with financial support from the Navy.

    Cost $ >30,000

    Now if I can just persuade the boss we need one

    Carlo

  2. #2
    Join Date
    May 2004
    Posts
    290
    I'm telling you, we NEED one of these...

    http://www.airtrax.com/flash/mp2_video_viewer.html

  3. #3
    Join Date
    Mar 2005
    Posts
    1136
    cool stuff - thx for th link

  4. #4
    Join Date
    Mar 2003
    Posts
    4826
    Wow, that is a really neat idea, not intuitive mind you, but brilliant nonetheless
    First you get good, then you get fast. Then grouchiness sets in.

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

  5. #5
    Join Date
    Jan 2005
    Posts
    1880
    That is one awsome peice of machinery!

    Too bad its probably a fortune! And those wheels Probably wont last very long, they also look like it would cost some $$$ to replace the polyurethane part too.

    I want one!
    thanks
    Michael T.
    "If you don't stand for something, chances are, you'll fall for anything!"

  6. #6
    Join Date
    Mar 2004
    Posts
    847
    Am I missing something, because these just look like the Omniwheels that robot hobyists have been using for a while now - just bigger?
    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
    Check Out My Build-Log: http://www.cnczone.com/forums/showthread.php?t=6452

  7. #7
    Join Date
    Jul 2005
    Posts
    12177
    Javadog;

    The omniwheels do not have the multiple rollers at the same angle to the main axis. I do not think they would scoot the vehicle sideways in the same manner when the front and rear wheels counter-rotate.

    Wheels similar to the Sidewinder's have been used on power wheelchairs, I have seen demo models but I think they are not practical because they are power hogs especially on a soft surface.

  8. #8
    Join Date
    Dec 2004
    Posts
    518
    Quote Originally Posted by Geof
    Javadog;

    The omniwheels do not have the multiple rollers at the same angle to the main axis. I do not think they would scoot the vehicle sideways in the same manner when the front and rear wheels counter-rotate.
    Hi Geof,

    Yup, when the wheels are parallel to each other the omniwheels wont allow crabbing. BUT, if you go to an arrangement where the wheels are angled with respect to each other, it's a different story. The simplest arrangement is a three wheeled holonomic platform where the "axles" all point to the center (like spokes in a wheel). Look here or here. Links to some video are on this page.

    Lance

  9. #9
    Join Date
    Jul 2005
    Posts
    12177
    Lance;
    Did you look at the forklift video? Quite impressive but I wonder about the durability.

  10. #10
    Join Date
    Dec 2004
    Posts
    518

    An expensive toy

    Quote Originally Posted by Geof
    Lance;
    Did you look at the forklift video? Quite impressive but I wonder about the durability.
    Those where exactly my thoughts. And when (not if) something breaks "who ya gonna call?" Not exactly like there are a lot of options. So you pay whatever they charge you. But the military is used to $10,000 screwdrivers, so I guess they wouldn't mind.

    Lance

  11. #11
    Join Date
    Dec 2004
    Posts
    518
    Geof,

    Think of it terms of a riding mower. Now THAT would be cool-one step beyond zero turning radius. I mow a BIG yard with a conventional tractor and one of these days I'm going to keep how much time is wasted looping around for the next swipe.

    Lance

  12. #12
    Join Date
    Mar 2004
    Posts
    761
    Quote Originally Posted by Evodyne
    Geof,
    Think of it terms of a riding mower. Now THAT would be cool-one step beyond zero turning radius. I mow a BIG yard with a conventional tractor and one of these days I'm going to keep how much time is wasted looping around for the next swipe.

    Lance
    Get one of these. Small turing radius. Fun to drive and costs a lot less than $30K ! (wedge)


    http://www.grasshoppermower.com/
    Wayne Hill

  13. #13
    Join Date
    Jul 2005
    Posts
    12177
    Quote Originally Posted by Evodyne
    Geof,

    Think of it terms of a riding mower. Now THAT would be cool-one step beyond zero turning radius. I mow a BIG yard with a conventional tractor and one of these days I'm going to keep how much time is wasted looping around for the next swipe.

    Lance
    I don't waste any time mowing our yard; my wife does it on her John Deere.

  14. #14
    Join Date
    Dec 2004
    Posts
    518
    Quote Originally Posted by Geof
    I don't waste any time mowing our yard; my wife does it on her John Deere.
    Ah...so I need to get married? Again? Hmmm... (what you DON'T see: a quiet moment of head scratching and contemplation) ...Nah! The mowing isn't THAT bad!

    Lance

  15. #15
    Join Date
    Dec 2004
    Posts
    518
    Quote Originally Posted by WayneHill
    Get one of these. Small turing radius. Fun to drive and costs a lot less than $30K ! (wedge)


    http://www.grasshoppermower.com/
    Thanks for the link! The next one will be ZTR, for sure. Lance

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