Tell A Friend

  • Friend's email:
 

NXT Dice Rolling Machine
This is a NXT dice rolling machine inspired by Rube Goldberg. It has one brain and one motor. How it works: The catapult throws a marble down a ramp. The marble pushes down a platform and so it pulls a string. The string turns a gear which turns another gear. The gear turns the orange Lego piece and pushes a marble down a ramp. The marble pushes the dice down a chimney, but the marble doesn't come out of the chimney as well because at the end of the ramp, there is a beam that is large enough for the dice to go under, but not the marble. the dice then rolls out of the chimney, so then you can see what you rolled.

Posted by:

 waitpuppy2

Created:

 18 March 2012

Rate:

 

Tags:(?):

 nxt, catapult, cool, machine, blue, video, crazycontraption, video

Building and Programming

The program for this was simple: make the catapult throw the marble and then come back down. The program may have been simple, but the building was not so easy. First, the catapult would throw the marble near the ramp not ON the ramp. This was fixed by lining up the ramp exactly with the catapult. One of the hardest challenges was getting the platform to stay up and only come down when the marble landed on it. The platform would either fall down before the marble landed on it and pull the string too early or the marble would land on the platform and it would not come down at all. This was fixed by getting the right amount of weight on the platform so it would stay up and come down when the marble landed on it. The most annoying challenge was when the marble would fall down the chimney along with the dice and roll off. This was fixed by adding a beam at the end of the ramp that the dice could slip under but the marble can't. If you really liked this dice roller, I will be posting again in less than a month with something better. :)

Comments

8 comments

  • idkwhoyouare

  • o cool love it come see my stuff

  • Posted 432 days and 3 hours ago


  • han-solo-ninja13

  • I love it how the string pulls the thing with the gear and how fast it does it or it looks like you just sped up the video and see my crazycontraption entry

  • Posted 432 days and 2 hours ago


  • sehyunchung312

  • The rules are: Only LEGO Elements may be used. I'm pretty sure that the marble is a LEGO element. But it is still a very cool project. Is the string a LEGO element to? Just making sure. Cool project though. Come see my stuff and please comment on my stuff! Cool project. :)

  • Posted 431 days and 23 hours ago


  • sehyunchung312

  • I meant that the marble is NOT a LEGO Element. Sorry.

  • Posted 431 days and 3 hours ago


  • IlikeLEGOs322

  • sehyunchung312 i think string is allowed and if he had a lego marble im sure he would have used it oh by the way five stars! ***** ps:could you make a ldd for it? its very cool

  • Posted 430 days and 9 hours ago



  • Maerskfan

  • it's amazing how long it takes to build, program and describe something that takes only a few seconds.

  • Posted 420 days and 11 hours ago


  • tidywidywu

  • Good project, although I would make it a little more complicated.

  • Posted 395 days and 22 hours ago


Add A Comment


Please log in or register to add a comment