Hello knexers!

Here are the instructions for the Shadow Separator, first seen in my knex ball machine Paradox.
This is the last part from Paradox, now the instructions for all the new elements/lifts/separators are online.

The Shadow Separator is a complex, piece consuming separator with a self-resetting mechanism.
If you don't want to spend too many pieces to a separator, I suggest that you just watch and don't build (It would still be nice if you did so :D), if you have some pieces left and don't mind using them in a separator, this is the perfect instructable for you!

About the name... I'm sure you're wondering why this is called the Shadow Separator.
I did not invent the self-resetting mechanism myself, it is Shadowman39's invention (You can find the original instructions here).
So a lot of credit goes to him, without his mechanism this separator wouldn't exist.
And to give even more credit (and because it sounds awesome :D), I called it the Shadow Separator.

I hope you like this separator, tell me what you think about it in the comments.

If you build this separator, please read every image note. They will help you a lot!
A problem? Questions? Feel free to comment or PM me.

Thanks for watching / building!



Step 1: Piece Count

Picture of Piece Count
If you want you can count the pieces before you start building.
Here is a list with all pieces included in this separator, named by their original color:


Green: 138
White: 82
Blue: 129
Yellow: 35
Red: 23
Grey: 1

Total rods: 408


Dark-grey: 40
Light-grey: 18
Orange: 26
Red: 69
Green: 11
Yellow: 84
White: 7
Purple: 102
Blue: 14

Total connectors: 371


Blue spacer: 41
Silver spacer: 38
Y-clip: 39
Tan clip: 8
Blue clip: 3
Blue hinge: 3
Black hinge: 3
Small hub: 1
Small tire: 1
Small blue gear: 1
Medium yellow gear: 1
Motor: 1

Total other: 140

Grand Total: 919
Knexmaster8882 months ago
It's ok, I modified it,
The only problem is that the little lever that goes up does not reset back down, but it works about 95% of the time
sandroknexmaster (author)  Knexmaster8882 months ago


Yeah it's a bit complicated, there are probably better ways to make a separator that functions the same. So if you want to give it a try ;)

Knexmaster8882 months ago
I just built it,
But the ball has trouble getting from the arm to the higher platform
15, 8:08 AM.jpg
sandroknexmaster (author)  Knexmaster8882 months ago

Thanks for building!

I can try to help you if you want, send me a private message and I'll see what I can do.

knexfun1016 months ago

Can I use this in my own ball machine?

sandroknexmaster (author)  knexfun1016 months ago


Gooppoop1 year ago
Woah really cool
sandroknexmaster (author)  Gooppoop1 year ago

Thanks! :)

WOW, It's Great! Unfortunately I'm not so good at building balmachines ... I can't wait for you next instructable :) (sorry for bad English)

Thanks! And that's no problem ;)

hunter9991 year ago

How did I miss this!?!?! A very cool seperator Sandro, I like how it resets itself. A neat mechanism.

sandroknexmaster (author)  hunter9991 year ago

Thanks! :D

cooljupjup1 year ago

Wow!, This is a really cool separator!

sandroknexmaster (author)  cooljupjup1 year ago

Thanks! :)



ryry20111 year ago

Looks Great.

sandroknexmaster (author)  ryry20111 year ago

Thanks! :)

Even thought I am not really sure how the last part resets the tracks
sandroknexmaster (author)  ryry20111 year ago

It works with Shadowmans self-resetting mechanism, but you will understand it best when you build it ;)

JonnyBGood1 year ago

Simply brilliant! You ball machinist make some of the prettiest mechanisms...

sandroknexmaster (author)  JonnyBGood1 year ago

Thanks! Don't forget the self-resetting mechanism is not invented by me ;)

LordThawk1 year ago
sandroknexmaster (author)  LordThawk1 year ago


Looks really good bro! I don't know much about ball machines (indeed, why are they called ball machines?), but this looks excellent. =D

Haha thanks :D

You are welcome!

This is sweeet!

sandroknexmaster (author)  dickheijboer1 year ago

Thanks! :)

Sorunome1 year ago

Nice seperator, I like it! :D

sandroknexmaster (author)  Sorunome1 year ago


knex akbar1 year ago

919 pieces for a path seperator... seems fair,

i will definatelly use this in my upcoming ball machine thanks for the instructions man

sandroknexmaster (author)  knex akbar1 year ago

Thanks a lot!

Let me know when you have finished your ball machine, I would like to see it ;)



Nice separator! I like that at the end the motor lifts the ball up, a good way to conserve height. Thanks for the credit. :-)

sandroknexmaster (author)  Shadowman391 year ago

Thanks and no problem! :D