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In lugnet.technic, Rob Hendrix wrote:
> Instead of having the bucket grab a ball from the bin, why not have a bin
> feed into a gravity tube that is ball sized. Then simply pick up a ball at
> the other end of the tube.
So, what exactly is a gravity tube? Maybe you mean something like:
Empty Full Half-full
| | |o| | |
| | |o| | |
| | |o| |o|
| |___ |o|___ |o|___
|_____ |o____ |o____
Hence, when a ball comes in (from bottom right of the tube), it pushes a ball
out from the top? In which case, I don't think it would quite work since the
number of balls in the reservoir isn't constant, a varying number being
otherwise occupied on the time-telling ramps.
Or maybe you mean something different? Perhaps something like a swing-arm/tube
that only has room for 1 ball, that flips around? Hm.
Now if only there were a way to create sufficient Lego-suction to suck a ball
all the way up the tube! That'd be pretty sweet... :)
You could also try and prep a ball by using an extra sensor, motor, and lift
timing. Basically pre-emptively lift a ball up the conveyor, use (say) a light
sensor to detect whether you actually GOT the ball up the conveyor, then do the
actual release exactly when the minute is up. If it missed the ball, it can just
try again.
DaveE
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Message has 1 Reply:
 | | Re: Rolling ball clock revisited
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| "David Eaton" <deaton@intdata.com> wrote in message news:I8DHDr.u1s@lugnet.com... (...) Not exactly what I was thinking, but you're close. If you stick your bendy straw in your 1/2 pint chocolate milk and then turn it upside-down, that's more of (...) (20 years ago, 7-Dec-04, to lugnet.technic, lugnet.robotics)
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Message is in Reply To:
| | Re: Rolling ball clock revisited
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| "Philippe Hurbain" <philohome@free.fr> wrote in message news:I8CKBA.152q@lugnet.com... (...) Awesome work, both of you! As for the mechanism occasionally not picking up a ball: Instead of having the bucket grab a ball from the bin, why not have a (...) (20 years ago, 7-Dec-04, to lugnet.technic, lugnet.robotics)
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