Introduction: Knex Ball Machine: Paradox

Picture of Knex Ball Machine: Paradox

My long expected big ball machine has finally arrived!

Hi everyone!

Here is my 4th big ball machine, Paradox.
I’m very proud of this build and I hope you’ll like it as much as I do.
It has 10 lifts and 11 paths, organized in 2 networks:  Network 1 has 1 lift and 3 paths, and network 2 contains 8 lifts and  8 paths aswell. The 10th lift is the ball shooter in the floor. I count it as a lift too because it also lifts the ball (Not very much but it can be higher or lower depending on the rubber band)
4 new lifts are included: In network 2 the 1st, 3rd and 5th lift, and the lift in the floor. Also 2 new path seperators (each network one) and some new elements.
This machine height is 2m90cm, width 1m85cm and depth 1m25cm.
Built time: 2 december 2012 - 17 may 2013
Pieces: 30674

-Intro 20th century fox and Paradox title created with
-Music by a friend.
-My sister for helping me with filming.
-My dad’s ladder.
-And offcourse all knexers who inspired me!

New elements 
1st new lift
2nd new lift
3rd new lift
4th new lift
1st new path separator
2nd new path separator

Paradox is the winner of the Toy Rods and Connectors Contest! 
I feel so happy about this, thank you so much for voting and supporting me!

Thanks for watching and enjoy!



THats just amazing thanks.

legoloverman (author)2017-02-15


FanPlastic (author)2016-01-07

Nice ball machine check out mine


vjky (author)2015-11-03

really amazing! Best compliment, how old are you?

sandroknexmaster (author)vjky2015-11-07

Thanks! Now 17, when I built this I was 15.

Lexi Knex (author)2015-09-25

ho my god im late but congratulation for winning the toys, rods and connectors contest and when this contest open ?

Thanks! I don't know, last year it was in april.

r0b0t14 (author)2015-05-08

congrats on winning i like the name =)

sandroknexmaster (author)r0b0t142015-05-09

Thanks! :)

The_42nd_Paradox (author)2015-04-27

Awsome machine, I like the name. :)

Thanks! :p

sandroknexmaster (author)2013-08-16

Everybody says that because it's the biggest project, but the biggest isn't always the best XP
I think everyone's chances to win are even big, but off course I'll be very happy if win :D

With the Knex community, most of the time people think a Knex project is better just because of its size. Congrats on winning the grand prize! :-D

www139 (author)Shadowman392015-03-28

Well said!

Like I said, I don't think so.
Thanks! =D

Well, it's that way with ball machines anyway, not with all projects. :-P

Yeah, you're probably right. =D

www139 (author)2014-08-20

How did you make the second lift on network 2 drop at the end?

www139 (author)sandroknexmaster2014-08-20


www139 (author)2014-08-20

How many pieces?

sandroknexmaster (author)www1392014-08-20

It's in the description :p


www139 (author)2014-04-12

oh! does the door lift stress the motor? it looks like it does. If it doesn't I might use it!

sandroknexmaster (author)www1392014-04-12

There is no door lift in this machine...

www139 (author)sandroknexmaster2014-04-12

oops! I saw you made one on another so I was confused...

sandroknexmaster (author)www1392014-04-12

Ah in Euphoria. It does stress the motor a bit, but it still works fine.

www139 (author)sandroknexmaster2014-04-12

oh okay!

www139 (author)2014-04-12

How did you film it?!!

sandroknexmaster (author)www1392014-04-12

With a camera ;)

www139 (author)sandroknexmaster2014-04-12

:L LOL! no seriously how?!(I mean the upper part)!!!!!

sandroknexmaster (author)www1392014-04-12

With a ladder ;)

www139 (author)sandroknexmaster2014-04-12

uummmmm ok sure... that is super tall!!!

www139 (author)sandroknexmaster2014-04-12

Good one!

wde dijk (author)2014-02-01

awesome i can't wait to see te separators

Thanks :D

hunter999 (author)2013-12-08

hmmmmm...I thought that Paradox was a robot....

Ha, nice! Never saw it before...

blockabloke (author)2013-11-05

Wow! that must have used up so much knex building that ... Crazy ball thingy!

Thanks a lot!

sandroknexmaster (author)2013-10-08

No problem ;D

Also another 2 elements...

the one at 9:33 and the one at 9:46, do you have any references to either of them? (sorry to be a pain). :P

Thanks in advance!

9:33 It's originally invented by thibaultisthebest in his ball machine ROUTE 66: at 14:45 in the video. Picture 22 in the intro of Paradox is the best view, sorry for no better pics :/
9:46 Originally invented by Tornado96 in his ball machine Uprising: at 3:32 in the video. Picture 16 in tornado's instructable is a good view.
I hope this will help :D

When will your ball machine be finished?

hunter999 (author)2013-10-08

Do you have any idea where I can find some instructions or images of the element at 1:53 - 1:56 ? I think it is a corkscrew...

I don't know if there are instructions for that element, I saw it once in a ball machine and copied it from the vid. Can you rebuild it from this vid? If you want I can send you some more pictures (I'll rebuild it myself if necessary)

Look in the past comment and thanks again! :-)

Oh and picture 20 in the intro is a good view, you can try to rebuild it from that picture ;)

Oh! Thats fine I can easily rebuild it from that picture :) thanks!

And no problem, again ;)

About This Instructable




Bio: Hey! I'm Sandroknexmaster. I like building with knex, especially ball machines. I live in Belgium. I speak Dutch, but also English and French. I ... More »
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