Instructables

Knex Skeeball Machine

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Picture of Knex Skeeball Machine
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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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Direct video link

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Where did you get the green gears? Knex User Group?

Shadowman39 (author)  knexinventions 493 months ago

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

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

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.

Shadowman39 (author)  akshat210453 months ago

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.

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.

Shadowman39 (author)  akshat210453 months ago

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.

thijs19022 months ago

i am bizzy wich a micro version of this skeeball machine

Shadowman39 (author)  thijs19022 months ago

Cool!

thijs19022 months ago

i have a document

with this name:

knex skeeball machine by this cool guy that I appreciate

Shadowman39 (author)  thijs19022 months ago

Haha, thanks :-P

thijs19022 months ago

have you any instructions of the gears

Shadowman39 (author)  thijs19022 months ago

No, sorry. :-(

thijs19022 months ago

I understand not only how the gears work the rest is

thijs19022 months ago

how many engines are in it and I think you are the best with knex

Shadowman39 (author)  thijs19022 months ago

There are 6 motors. Thanks!

Monkeys113 months ago

I really want instructions!

sonic broom4 months ago

Can you make a mini on with instructions

I doubt shadow will. He is currently building a ball machine: Citadel.

You2135 months ago
This is crazy awesome and takes dedication and engineering skills GOOD JOB!!!!
Shadowman39 (author)  You2135 months ago

Thanks! :-)

EliteKnex1015 months ago
Were You Buy Your Knex Please Tell Me
Shadowman39 (author)  EliteKnex1015 months ago

I buy them from Ebay.

EliteKnex1015 months ago
Yoo
Shadowman39 (author)  EliteKnex1015 months ago

?

He made a Skeeball machine just like yours. Compare the avatars

Derp! :-)

Shadowman39 (author)  hunter9995 months ago

Haha, that avatar does look pretty familiar. :-P

EliteKnex1015 months ago
We're u but ur knex from and nice job!
Shadowman39 (author)  EliteKnex1015 months ago

Thanks!

supercolt445 months ago
Your My Biggest fan, I have a big ball track but your just amazing! I love how you thing and work can u put more easy tuts 4 ball tracks and were do u buy all your knex please respond back
Shadowman39 (author)  supercolt445 months ago

Ha, thanks! As for more instructions, I won't have any posted until Citadel is apart, and I plan to finish it in the summer (I'm going to post a guide to the elements and Ibles for the lifts). I buy my Knex from Ebay.

Monkeys116 months ago
Do you know where I can get instructions or anyone else who built it that might have instructions. Thanks
Shadowman39 (author)  Monkeys116 months ago
I don't know of any instructions anywhere, sorry.
Can you post how to make the coin mechanism? I'm making a ball machine.
Shadowman39 (author)  knexinventions 497 months ago
Yeah, that will eventually be posted, but I'm not sure when yet. The only place that there are pictures of it are in this comment section.
fries1238 months ago
Great job dude. Now it will take me the rest of my life to stock up and think how the heck you are so good...
Shadowman39 (author)  fries1238 months ago
Lol, thanks!
parshan9 months ago
*Faint*
Shadowman39 (author)  parshan9 months ago
Ha, if that's a compliment then thanks! :-P
Depends on if I fall on it
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