Relógio de esferas (Com RXT)

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tmactx
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Relógio de esferas (Com RXT)

Mensagem por tmactx »

Deixo aqui um MOC (não fui eu que fiz)... .


This clock is based on the Arrow Handicraft Deluxe Rolling Ball Clock that was popular in the 80's.

To tell the time read the hour from the 3rd row of balls.  For the minutes add the 1st and 2nd row of balls together.
On the first row 1 ball = 1 minute.  On the second row 1 ball = 5 minutes.

My friend Chris Scheuerman asked me if i had ever seen a rolling ball clock before.  He told me that he just got one and that i should come take a look at it and try to make one out of LEGO.  I never did go over and look at his clock.  In fact my clock was built strictly from pictures found on the web.  I have never seen one of these clocks in person.  I spent about 2 months making this moc and 1 month fine tuning and debugging.

The ball holding, balancing, tilting, and logic was simple to make.  It did take a few bricklink orders to get enough ribbed tubbing and soccer balls.  The lift mechanism is what stumped me.  I thought about it for about a month before i came up with a design that i thought would work.  It still took a lot of tweaking to get it to work correctly.  The real clock has a rotating arm that lifts the balls up to the top.  I was originally going to copy the same rotating arm, but i would have needed a very long arm because of the height of the ball logic.  So i went with the chain lift mechanism.  It turned out very well. 

During debugging improvements were made like adding extra guard rails so all the balls would return to the ball holder and not the ground.  One problem that i have not solved yet is the lift mechanism is not 100% accurate.  Very rarely, 2 balls are lifted at the same time or no balls are lifted at all.  But i think that the no lifts and the 2 ball lifts even then selves out because after running for 3 days at Brickfest PDX it was only about 1 or 2 minutes off.

I think i will keep this one together for a while.  It is kind of mesmerizing watching the balls go up and roll around.


Será que alguém consegue fazer igual?
É que eu tenho a versão (sem ser Lego) deste relógio em plástico (posso tentar anexar algumas fotos...).

Aqui um vídeo do original em tempo rápido (cada espera representa um minuto...:
http://www.youtube.com/watch?v=-3hNCinIBdk


Deixo aqui as instruções para construção:

http://www.brickshelf.com/gallery/bobko ... _clock.mpd

Para ver a pasta no brickshelf:

http://www.brickshelf.com/cgi-bin/gallery.cgi?f=73767
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BionicDroid
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Re: Relógio de esferas (Com RXT)

Mensagem por BionicDroid »

Magnifíco.
Carlos Ribeiro
jetro
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Re: Relógio de esferas (Com RXT)

Mensagem por jetro »

Isto foi apresentado em LUGNET o 25-02-2004!!!

http://news.lugnet.com/technic/?n=12160
tmactx
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Re: Relógio de esferas (Com RXT)

Mensagem por tmactx »

[quote="jetro"]
Isto foi apresentado em LUGNET o 25-02-2004!!!

http://news.lugnet.com/technic/?n=12160
[/quote]

isso é que eu não sabia...

Se alguém conseguisse fazer um para a Lorinhã para 2010... era espectacular.  :fixe:
jetro
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Re: Relógio de esferas (Com RXT)

Mensagem por jetro »

Tambem ha video do modelo LEGO de Bob Kojima aqui: http://klickitat.fial.com/bob/rollingballclock/

O Philo fiz uma versao com RCX com melhor presiçao: http://www.philohome.com/kojima_clock/ball_clock.htm
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