Introduction: Metropolis - a K'nex Ball Machine

Direct link to video

 
Finally it's done! Metropolis, my second ball machine. It has a total of 12 different paths, 16 if you count all small sidepaths as well. And it consists of many new elements I designed myself.

I have posted the instructions of some elements here:
Link to Instructions


Building time:            Oct '09 - Aug '10

Dimensions:              Width   1.40 m
                                      Depth  1.15 m
                                      Height 2.40 m

Weight:                        48 kg

Number of pieces:    29.873


Enjoy the video and thanks for looking.

Kairah

Comments

author
J%27RonM made it!(author)2017-03-06

awesome!

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FanPlastic made it!(author)2016-05-01

Only twenty nine point eight seven three pieces? That's funny I would guess it would be more like somewhere around 29,873

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GrimEagle made it!(author)2016-01-27

That's amazing.

author
GrimEagle made it!(author)2016-01-27

Wow.

author
FanPlastic made it!(author)2016-01-07

Nice ball machine check out mine

author
Lolman4000 made it!(author)2015-04-25

Wow so cool! I think the most amazing part is that you did it with just 3 motors!

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tylerman123 made it!(author)2012-05-14

alright now give us step by step instrutions :)

author
Lolman4000 made it!(author)2015-04-25

lol

author
Quidditch33 made it!(author)2015-03-04

Instructions? Lol jk

author
www139 made it!(author)2014-07-01

what k'nex tubing do you think is best for k'nex ball machines?

author
www139 made it!(author)2014-03-29

I've watched the video like at least 100 times and I still don't know how you got that zig-zag element to work (I've made some myself!!!)

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dr.+richtofen made it!(author)2012-01-07

AMAZING!!!

author
knexforever made it!(author)2013-11-13

i agree

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Kairah made it!(author)2012-01-07

Thanks!

author
dr.+richtofen made it!(author)2012-01-07

No Problem!

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knexforever made it!(author)2013-11-13

this is epic beyond beleif. congratulations!

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geeksquad made it!(author)2013-02-23

can you tell me were i can buy this, i would really appreciate it. i love knex and i want to build this thing so if you could please tell me were i can buy it and how much it was thank you.

author
Alocke made it!(author)2013-10-20

In case you're still wondering, there are no instructions for something like this. He designed and built it over a really long time, and likely bought quite a few extra pieces along the way. I'm working on something similar right now, and it's a lot of patience and taking things apart when they don't work exactly how you want them to

author
hunter999 made it!(author)2013-06-24

Truly awesome, This is by far the most colossal K'nex ball machine on instructables and was more than worthy than my time, it is far beyond optimum! You earnt a sub! Keep it up mate ( yes this comment is late...)

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puppetjax made it!(author)2013-06-23

Omg that is the most gigantic knex creation i have ever seen!

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vishalapr made it!(author)2013-06-01

How much power does the whole thing draw? This is the best Knex machine I have ever seen! Making something like this for me is impossible as I would quit in less than a week or 2 XD

author
ryry2011 made it!(author)2013-01-09

if you dont mind me asking how much money do you think you have in knex?

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CaseBoy made it!(author)2012-11-25

I don't really care for k'nex, but that was the most ingenious thing I have ever seen. props.

author
crackman made it!(author)2012-07-22

Great ball machine! This is probably the best ball machine on instructables. Nice job.

author
Retro+Correct made it!(author)2012-05-15

+1 on the Philip Glass music!

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soap+and+price made it!(author)2012-04-26

How did you make that!!!!!!!!

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Gnmar2723 made it!(author)2012-04-22

hey kairah are you making a new machine or or you just going to leave metropolis up forever? because i think everyone in the instructables knex ball machine community thinks your a god or something and we really want to see another machine if your making one or know if your never going to make one again. PLEASE RESPOND! YOU ARE AMAZING!!!!!

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dylan434 made it!(author)2012-02-19

awesome work!

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Orangeprofessor made it!(author)2012-02-01

hai

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arjun1 made it!(author)2012-01-21

WOOOOOOOW!!!!!!!!!!!!!!!!!!!!!!!
so cool!!!!!

author
Orangeprofessor made it!(author)2012-01-10

Great music

author
knexinventer made it!(author)2011-09-12

awesome again. i was thinking that if you want a challenge tat you could try to rebuild one of these from this site or any others again you dont have to. K.I
http://www.automotto.com/entry/k-nex-assembles-rods-connectors-to-replicate-means-of-transportation/

knex-sculptures9_idz7t_3868.jpgknex-sculptures4_d7R6z_3868.jpgknex-sculptures5_VboBX_3868.jpg
author
Puddock made it!(author)2011-12-19

Those are incredible! Did you make these?

author
knexinventer made it!(author)2011-12-20

no they were on a website

author
Puddock made it!(author)2011-12-20

Oh.

author
Puddock made it!(author)2011-12-19

Awesome!

author
Cristiano+Ronaldo made it!(author)2011-11-03

Holy crap I thought that it took 2year or some thing like that5*

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Elap made it!(author)2011-10-20

Oh, wow! There are so many original ideas here.

Hearty congratulations on a wonderful achievement.

author
bbaron1 made it!(author)2011-10-15

WOW! I don't have any words to express what I want to say. That is just amazing!

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weirdestguy98 made it!(author)2011-10-14

HOLY CRAP!!!!!!! I'VE SEEN SUM AMZAING STUFF BUT THIS BY FAR IS THE KOULEST THING I'VE EVER SEEN IN MY 13 YR OLD LIFE!!!!!!!!!! YOU R MY HERO!!!!!!!!!!!!!!!

author
lguillette made it!(author)2011-10-07

Absolutely incredible. Beyond words.

author
skyrider94 made it!(author)2011-09-28

who thinks this should be a knex set... it would cost 1000 pounds but who cares

author
TigerNod made it!(author)2011-09-22

O_O

I am stunned. I absolutely am. What is there to say about this, other than that it is awesome beyond words?

author
AlternateLives made it!(author)2011-09-14

If that number (piece count) is what I think it is... you have WAY too many Knex. But at least you can build with them. I mean it. That is awesome!

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mystermysteryguy made it!(author)2011-08-24

i luv it =)

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nickcube4 made it!(author)2011-08-13

This is insane! It Should go in a museum

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timmmy made it!(author)2011-07-29

HOOOOOOOOOOOOLLLLLLLLLLLYYYYYYYYYY SSSSSSSSSSSSSHHHHHHHHHH#TTTTTTTTTTTTTTTTTTTTTTTTTT!!!!!!!!!!!!!!!!!!!!!!! ITS HUGE

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patriots8888 made it!(author)2011-08-09

THATS WHAT SHE SAID!

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imdoinme1999 made it!(author)2011-08-12

Hehe.. Like^^

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sleepismything92 made it!(author)2011-08-11

If you can make this you have soo much potential as a mechanical engineer and even more. this is just mind boggling but you got some straight up real potential. now you just have to channel this into a real-life machine or something similar. like a childs vending machine for in places like chuck-e cheese's that gives you the ball at the end of this whole contraption and you could charge like .75 or a dollar per play. you get the hint. your talented