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Subject: 
A fast NXT 2.0 ball sorter
Newsgroups: 
lugnet.robotics
Date: 
Sun, 27 Dec 2009 16:33:41 GMT
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Fast NXT 2.0 ball sorter, manages 2 balls per second...

Write-up, photos, building instructions here

Enjoy!

Philo

   
         
     
Subject: 
Re: A fast NXT 2.0 ball sorter
Newsgroups: 
lugnet.robotics
Date: 
Sun, 27 Dec 2009 17:25:18 GMT
Original-From: 
Jim West <JIM@JAMESWESTstopspammers.COM>
Viewed: 
16486 times
  

Elegance in motion!  Very cool indeed.

Thank you for sharing!

Jim


At 09:33 AM 12/27/2009, Philippe Hurbain wrote:
<http://philohome.com/fbs/fbs.htm<http://philohome.com/fbs/fbs1-v.jpg>>

Fast NXT 2.0 ball sorter, manages 2 balls per second...

Write-up, photos, building instructions [<http://philohome.com/fbs/fbs.htm
here>]

Enjoy!

<http://philohome.com Philo>

   
         
     
Subject: 
Re: A fast NXT 2.0 ball sorter
Newsgroups: 
lugnet.robotics
Date: 
Sun, 27 Dec 2009 21:25:53 GMT
Viewed: 
16736 times
  

In lugnet.robotics, Philippe Hurbain wrote:
  

Fast NXT 2.0 ball sorter, manages 2 balls per second...

Write-up, photos, building instructions here

Enjoy!

That’s VERY cool Philo! Have you investigated speeding it up by unlinking the 2 sorter levels, ie move the top level for the next ball while the bottom level is still positioned for the current ball? May need a holding pen between level 1 & 2 though, which would likely push you over the 1 set limit.

ROSCO

    
          
     
Subject: 
Re: A fast NXT 2.0 ball sorter
Newsgroups: 
lugnet.robotics
Date: 
Mon, 28 Dec 2009 10:42:12 GMT
Viewed: 
16426 times
  

That's VERY cool Philo!

Thanks !

Have you investigated speeding it up by unlinking the
2 sorter levels, ie move the top level for the next ball while the bottom
level is still positioned for the current ball? May need a holding pen
between level 1 & 2 though, which would likely push you over the 1 set limit.

I initially thought I would have to do that, but actually in this design the
speed limitation comes from the ball splitter mechanism (in the NXC version it
runs full speed without stopping). I have not tried with alkaline batteries
(here I use LEGO Li-ion battery), their higher voltage would make the sorter a
tad faster.

The other tricky timing is between color detection and first level switch. My
first program waited for the end of ball bassing before switching - it was too
long and flip occured while ball was in the switch, resulting in an ejection...

Philo

   
         
     
Subject: 
Re: A fast NXT 2.0 ball sorter
Newsgroups: 
lugnet.robotics
Date: 
Sun, 27 Dec 2009 21:55:28 GMT
Viewed: 
16657 times
  

Wow! Simply fantastic; great work Philo. And so fast that the slow motion video is really needed to see what’s going on!

Thanks for sharing. Alexander

   
         
   
Subject: 
Re: A fast NXT 2.0 ball sorter
Newsgroups: 
lugnet.robotics
Date: 
Tue, 5 Jan 2010 14:12:38 GMT
Viewed: 
16834 times
  

Philippe Hurbain wrote:

  

Fast NXT 2.0 ball sorter, manages 2 balls per second...

Cool! And very impressive.

Play well,

Jacob
--


 

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