With Instructables you can share what you make with the world and tap into an ever-growing community of creative experts.
share what you made with text, photos, video, and files
gather your favorite instructables together
Hello everyone, I wanted to post a selection of elements that I used in my latest ball machine metropolis. I can't post all of them with step by step ...
If you haven't seen Metropolis, go to this link for the slideshow. Or watch the video here: Direct link to the video
Here's the flat spiral, the ball will roll away from the center. It is very hard to get the orange track right. But it's also very cool to look at :) ...
I modified this from another instructable. The ball will enter the basket, spin 300° and then drops out of the basket onto the next path. Credits for...
This basket releases five balls at once. You can adjust the weight by adding or removing wheels.
When installed correctly this can be used to allow balls to pass one by one.
These stairs make a rattling sound. Version one is with white rods and version two with blue rods.
Spinning objects that can be used inside a support tower.
This is my favorite part of metropolis, the zigzag! In the video it is used in path 11 at 9:20. When you make this, make sure the ball has some spee...
I used this to catch the ball after the zigzag element.
This half pipe doesn't use a mechanism that drops the ball when it reaches the bottom, so it can be used in very narrow spaces.
A double spiral with a thick red edge. The center pieces are connected with an Y-connector (knex man hand). It is very heavy and needs to be supported...
It drops two balls at the same time...
A path made with flexible rods. You can also use normal rods for straight bits. It's quite fragile so make sure you support it enough!
A fully customizable rollercoasterish path, you can make pretty much every kind of shape with this. It's also very sturdy, the ball rolls very well an...
The lift consists of wheels that have four long arms on it. I used one 12 Volt motor for two wheels. And connected the two wheels with a long chain.
Right after you have made the wheels, it is time to install them in the tower. You can put a motor directly on the main axle of the wheel, or connect...
I have cut the instructions for the wheel lift in three parts. The base, middle part and top part. You can make this lift as high as you want, and as ...
Make it as high as you want. You can add the motor later on (I would put it somewhere in the middle).
The orange track connecters can be replaced by yellow ones, depending on your choice of track you want to use.
By making the corner very sturdy and adding an inclined plane, the ball will bounce against the plane and retain its speed!
We have a be nice comment policy. Please be positive and constructive.
Metropolis - a K'nex Ball Machineby Kairah
The Official Guide to K'NEX Ball Machine Elementsby collinjo12
K'nex ball machine the element new elementsby www139
Fenrir119's Knex Ball Machine Elementsby fenrir119
My new K'nex ball machine elementsby dickheijboer
Knex Ball Machine Radonby KneXtreme
The Ultimate Guide to K'nex Ball Machine Elementsby Darth Trainman
The Official Guide to Knex Ball Machine Liftsby Shadowman39
Retrograde-A K'nex Ball Machineby MechanicalCreationMaster
K'nex Giant Ferris Wheelby cqdmgy
Download our new apps for iOS, Android and Windows 8!
© 2015 Autodesk, Inc.
By clicking "Create Account" you are indicating that you have read and agree to the Terms of service.
Already a member? Login »
Enter the email associated with your account and we will send you your username and a temporary password.
Not a member? Sign Up »