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'RonM (author)2017-03-06

awesome!

author
FanPlastic (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

author
GrimEagle (author)2016-01-27

That's amazing.

author
GrimEagle (author)2016-01-27

Wow.

author
FanPlastic (author)2016-01-07

Nice ball machine check out mine

author
Lolman4000 (author)2015-04-25

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

author
tylerman123 (author)2012-05-14

alright now give us step by step instrutions :)

author
Lolman4000 (author)tylerman1232015-04-25

lol

author
Quidditch33 (author)2015-03-04

Instructions? Lol jk

author
www139 (author)2014-07-01

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

author
www139 (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!!!)

author
dr. richtofen (author)2012-01-07

AMAZING!!!

author

i agree

author
Kairah (author)dr. richtofen2012-01-07

Thanks!

author
dr. richtofen (author)Kairah2012-01-07

No Problem!

author
knexforever (author)2013-11-13

this is epic beyond beleif. congratulations!

author
geeksquad (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 (author)geeksquad2013-10-20

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 (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...)

author
puppetjax (author)2013-06-23

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

author
vishalapr (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 (author)2013-01-09

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

author
CaseBoy (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 (author)2012-07-22

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

author
Retro Correct (author)2012-05-15

+1 on the Philip Glass music!

author
soap and price (author)2012-04-26

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

author
Gnmar2723 (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!!!!!

author
dylan434 (author)2012-02-19

awesome work!

author
Orangeprofessor (author)2012-02-01

hai

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arjun1 (author)2012-01-21

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

author
Orangeprofessor (author)2012-01-10

Great music

author
knexinventer (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 (author)knexinventer2011-12-19

Those are incredible! Did you make these?

author
knexinventer (author)Puddock2011-12-20

no they were on a website

author
Puddock (author)knexinventer2011-12-20

Oh.

author
Puddock (author)2011-12-19

Awesome!

author
Cristiano Ronaldo (author)2011-11-03

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

author
Elap (author)2011-10-20

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

Hearty congratulations on a wonderful achievement.

author
bbaron1 (author)2011-10-15

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

author
weirdestguy98 (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!!!!!!!!!!!!!!!

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lguillette (author)2011-10-07

Absolutely incredible. Beyond words.

author
skyrider94 (author)2011-09-28

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

author
TigerNod (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 (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!

author
mystermysteryguy (author)2011-08-24

i luv it =)

author
nickcube4 (author)2011-08-13

This is insane! It Should go in a museum

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timmmy (author)2011-07-29

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

author
patriots8888 (author)timmmy2011-08-09

THATS WHAT SHE SAID!

author

Hehe.. Like^^

author
sleepismything92 (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