Knex Skeeball Machine

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Introduction: Knex Skeeball Machine

About: On my page you'll find lots of different Knex projects, from ball machine lifts to useful items. I hope you enjoy!  _______________________ Current avatar: Target of my skeeball machine Past avatars: …
Hello everyone! After over a year, it's finally finished: my Knex skeeball machine! This machine is full-size, coin-operated (takes quarters), turns itself off automatically, and counts points using a mechanical counter. And, all of it is mechanical, using only normal motors to power it (no CyberKnex motors). There are six motors used in the machine; four of them are used for just the counter. The only non-Knex parts used are a few rubber bands and the paper for the counter.

The video below shows the machine in action!

This game is a lot of fun to play, for me and my family (my dad has the highest score, over 400 points). I've only scored in the 1000 point hole 2 times, and I haven't seen anyone else score that one, so it's very hard to get the ball there. Playing time for one game is about 1:30, plus how long it takes to throw eight balls. 

Note that my camera lens makes things look curved, for example the ramp in picture 7. Insides of the machine start at picture 17.

Fun fact: If one were to buy enough new Knex pieces to build this, the cost would be around $4,391. The piece category that costs the most money are the yellow connectors, which would cost $835.

I will not be making instructions of this whole machine, but I have made other models that use mechanisms from this machine. These smaller models do have instructions, so you can still build some of the mechanisms used in the skeeball machine.
  • Leave Me Alone Box uses the same motor mechanism (the one in the box is more compact than the ones used in skeeball). 
  • Coin Sorter V2 uses the same coin sorting method found in the skeeball machine.

Started building: May 24, 2011
Finished building: July 26, 2012
Width: 26 & 3/8 inches (67 cm)
Length: 85 inches (216 cm)
Height: 57 & 1/4 inches (146 cm)
Pieces: 28,396


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    478 Comments

    0
    Knexified
    Knexified

    11 days ago

    This is a really cool build!! I never thought you could build to this limit! But one thing I need to ask: How long, on the days you worked on this, did you take to build a part of the skeeball machine?

    0
    radical28
    radical28

    3 months ago

    I might try make a tiny version, I just need to know the score and coin mecenism

    0
    Shadowman39
    Shadowman39

    Reply 3 months ago

    There are links above to some other Instructables that cover the main mechanisms, mainly the leave me alone box. However, it might be difficult to make the counter smaller because this one was already pretty compact.

    0
    radical28
    radical28

    Reply 2 months ago

    Ok thanks.
    Also could you post an instructable on the counter?

    0
    diehlconnorm
    diehlconnorm

    Question 1 year ago

    when is your next project

    0
    Shadowman39
    Shadowman39

    Answer 1 year ago

    I'm still in college right now, so I don't have big projects planned anytime soon. I can only build smaller things over breaks, such as my most recent project, the lobby ball machine.

    0
    radical28
    radical28

    Reply 3 months ago

    That was cool.

    0
    DanW205
    DanW205

    Question 1 year ago on Introduction

    Hi! I've been collecting pieces and sets because once upon a time I saw a piece count on here. Do you have a piece count for me to target? I'm getting close! (Yes I know, that means $10k or so.. I've been raised on knex with multiple rollercoaster and ball factory sets, and have been collecting the oddities as I see them)

    0
    Shadowman39
    Shadowman39

    Answer 1 year ago

    The exact total is 28,396, but I don't have a piece breakdown.

    0
    Shadowman39
    Shadowman39

    Reply 3 years ago

    Thanks!

    0
    HatersDupstep
    HatersDupstep

    Reply 3 years ago

    Your welcome! ;)

    0
    Shadowman39
    Shadowman39

    Reply 7 years ago on Introduction

    No, I called the Knex company and ordered over the phone.

    0
    akshat21045
    akshat21045

    Reply 7 years ago on Introduction

    Well, you should try K'nex User Group. They sell pieces at a really cheap price.

    0
    Shadowman39
    Shadowman39

    Reply 7 years ago on Introduction

    I actually don't like that site so much, because for most pieces they just redirect to the Knex.com site (I use the US/Canada site). But, I am happy with the plugin motor that I got from there.

    0
    akshat21045
    akshat21045

    Reply 7 years ago on Introduction

    Oh yeah, I forgot. I used the international button coz I am in India currently, and I bought around 1100 pieces for 60 pounds. Otherwise, on K'nex.com, I would have got less parts (around 900) for 120 Dollars. That totally sucks.

    Of course Ebay is the cheapest source other than garage sales (JonnyBGood bought 5000 pieces for 20 bucks), but I ain't gonna trust them.

    0
    PartMan7
    PartMan7

    Reply 3 years ago

    I wholeheartedly agree. I use my dad's business trips to the States as a source of K'nex. Amazon.in sells them at nearly twice the standard rates..........

    0
    Shadowman39
    Shadowman39

    Reply 7 years ago on Introduction

    At least with garage sales you might get to see the pieces before you buy them. I had to return white rods that I got from Ebay because they were dirty and discolored. Of course the seller never mentioned any defects and provided a picture of only one of them, which looked perfect.

    0
    knex akbar
    knex akbar

    Reply 6 years ago on Introduction

    They don't sell large yellow gears, newer sized knex balls, purple rollercoastertubing,purple connectors, dark blue 3d connectors and dark blue rods, that's why I buy my knex second-hand.