Re: A fast NXT 2.0 ball sorter

"Philippe Hurbain" <[email protected]> Mon, 28 Dec 2009 10:42:12 GMT
Newsgroups gmane.comp.hardware.lego.robotics
Organization None
Message-ID <[email protected]>
> 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