Knex 'Puzzle' Ball Lift

Introduction: Knex 'Puzzle' Ball Lift

About: I'm into knex ball machine stuff. My favourite parts are lift/element hybrids, probably because I tried building a perpetual ball machine. It didn't work, of course. All my knex stuff is creative common, and …
Here's a ball lift which is a mix between thealternator lift and the jigsaw lift.

Before you start decide how high (in blue rods*) you want it to go. This number will be needed later.
For these instructions I will build it to go up 4 blue rods.


*The ball ends at a point halfway through a blue rod. Round up the number.
Unless you're making an alternative entrance track, the ball starts one blue rod up.

Step 1: Sections

These are all the parts you'll build. Each step shows a different part in detail.

Step 2: Motor Section

The majority of this is padding and presentation for the motor. Other than that there is a gear (can be red) and a rod poking out.

Step 3: The Scoop

This is the path the ball gets "Scooped" into for the lift to work. This could be the enterance track, but then the ball needs the land at the right time. (3/8th of the motor's rotation)

Step 4: Connecting These Parts

Now you have the motor section and the scoop section. Connect them at 4 points.

Step 5: The Gears

These gears keep that moving bit verticle.

Step 6: Supporters of That Moving Bit

Now get out your number mentioned in the intro. Make sure the amout of white connectors on one of these is one less than your number, and on the other make it should be 2 less than your number.

Step 7: Adding Those

Just 2 connections.

Also, I just realised, three extra pieces (yellow connector, white rod, red rod) should be in step 4. They're in picture 3.

Step 8: That Moving Bit

Once again, take you're number (intro), subract 1, and that's how many blue rods there should be.

Step 9: Adding That Moving Bit

Those Y-clips should connect to the orange connectors.

Step 10: Ball Supports

Get your number (intro), add 1, that's the equivilant of how high these should be.

1 red rod = 2 blue rods

Step 11: Adding the Supports

There are 4 connections in total.

Step 12: One-way Flaps

There should be the same amount of flaps as your number.
This will be folded up when added.
Note that at the bottom, the are no dark grey connectors, and on the top there is an extra part.

Step 13: Adding the One-way Flaps

Start by connecting the bottom 2 green rods, making sure the scoop is on the right side. Put on the scoop then fold up the piece. Getting it past the gear might be hard so do that first.

Step 14: The Top, and Adding It

This top gets connected to the supports of the moving bit, the supporters of the ball, and the scaffold.

Step 15: Entrance Track

Optional if you're making a custom version.

Step 16: Adding That

6 connections.

Step 17: Loader for Entrance Track

The balls land here.

Step 18: Adding the Loader for the Entrance Track

This is probably the hardest step so watch the pictures carefully.

Step 19: Exit Track

Just watch all the pictures.

Step 20: Finish!

Add that, then you're done!

Step 21: VERY OPTIONAL Entrance to Loader of Entrance Track

In case you don't know a way of leading up to it: this!

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    1 year ago

    also, you should add a parts list. And then tell the required pieces for every added section.


    1 year ago

    lol. I love how he said steep 15 instead of step 15.


    6 years ago

    I am having trouble getting the entrance track to work. Any tips on how to make it work?


    Reply 6 years ago

    I am not entirely sure what your problem is.

    Is the ball getting stuck at the Loader (step 17)? If so, replace the blue rods with white rods.

    Is the ball not rolling on the Entrance track (step 15)? Is it getting blocked by That Moving Bit (step 8)? If so, I suggest making your own entrance track. This requires removal of pieces in step 3, 15, and 17, and some imagination.

    Step 3: In the first picture there are 2 yellow rods. Remove the one on the right. Above that there is a blue rod and a dark grey connector. Remove those pieces as well.

    Step 15: Remove the Red-Green-Orange-Green part, as well as the yellow rod beneath it.

    Step 17: Replace the yellow and green connectors with light grey connectors.

    Imagination: Make a path connecting the Loader to the Scoop.

    If your problem is that the ball wouldn't roll down the entrance track, then your custom track will be steeper than the example Entrance track.

    If your problem is that the ball was being blocked by That Moving Bit, then your custom track will be lower than the example Entrance track.

    I hope that helps.


    Reply 5 years ago

    no, my problem is that the ball doesn't even go up, it just gets stuck at the scoop


    Reply 5 years ago

    I'd have to see a video/pictures of the ball trying to get through your lift in order to help you.


    Reply 5 years ago

    Okay but I destroyed it before I got any vids of it working. sorry. :p


    Reply 6 years ago

    Thanks for all this help!


    9 years ago on Introduction

    Cool! This is definitely a lift I'll eventually use sometime.