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Subject: 
Re: moving in a straight line with two motors?
Newsgroups: 
lugnet.robotics
Date: 
Wed, 18 Nov 1998 14:23:35 GMT
Original-From: 
Laurentino Martins <lmartins@/saynotospam/marktest.pt>
Viewed: 
1974 times
  
Anyone have already tried making a differential gear transmission with LEGO pieces?
I'd really like to see it is done...

Laurentino Martins

--//--

At 07:08 17-11-1998 Tuesday , you wrote:
(*LURK MODE OFF!*)
Hello, My name is Daryl, and I am a LegoManiac.
I have now applied the RCX to automate my Samurai's Stronghold for 'LE*Owars'.

Sad, I know.

To get 2 motors to work together to drive 1 axle in the vector you want, try a
differential gear transmission.  Basically, the input of 2 power sources (the
rotating shaft of the motor) is  'averaged' and the output is applied to the
main transmission.  The main effect is that now, two dissimilar engines can
work
together, making more 'torque', but, the output is 'very' regulated, giving the
opportunity of determining the position (distance traveled) of the 'bot by dead
reckoning.

(*LURK MODE ON!*)

--
==============================================================
|Daryl McLaurine, Consultant          Wrk: 847/632-4198      |
|Motorola, Inc., CIG, ITS             Fax: 312/632-6658      |
|1501 Shure Drive, IL27-3B4           Pgr: 630/???-????      |
|Arlington Heights, IL  60004        Alph: 630/314-9675      |
|              http://www.cig.mot.com/~mclaurin              |
==============================================================



Message has 4 Replies:
  Re: moving in a straight line with two motors?
 
(...) Lego already has a special "differential" piece. The Super Car has three of them. I think you can even buy it a la carte. --Ken (26 years ago, 18-Nov-98, to lugnet.robotics)
  gear differential
 
(...) I've built a fairly compact one using only standard gears and pieces. I'm waiting for my digital camera to put up some photos of it somewhere. Mail me if you want a sneak preview. (26 years ago, 18-Nov-98, to lugnet.robotics)
  Re: gear differential
 
(...) LEGO (...) Yes! You are correct. I've been playing with my Super Car and found that this was a very cool thing when I got my car last Christmas. I'll take a some pix of the underside of the Super Car if you all are interested on how the (...) (26 years ago, 18-Nov-98, to lugnet.robotics)
  Re: gear differential
 
I would be more interested in a differential made with standard Mindstorms/CyberMaster pieces, if that's possible of course. Laurentino Martins (...) (26 years ago, 18-Nov-98, to lugnet.robotics)

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