Introduction: Knex Parallel Arm Lift

Picture of Knex Parallel Arm Lift

Here is my newest lift: the Parallel arm lift!
Most credits go to Shadowman, as he invented this lift first in his unfinished ball machine, I tried to rebuild it from the vid (only managed to rebuild the front part of the arm and some basic ideas).
So, this instruction is very complicated and nothing for absolutely beginners.
And it is also loooooooooong.
Be sure that all 3D connectors are turned correctly, with some you also have to pay attention that they aren't turned 180°, I'll note which in the image notes, so be sure to read them!
Sorry for any fails I made, making instructions was quite complicated.
And feel free to ask if you have any problems!
I use a plug-in motor, and I would recommend also using one as they have more power than the battery motors. Maybe you could use two battery motors...

Be sure to comment, rate and subscribe!

Oh, and the first one to make a piece count will earn a patch :D (But please be honest about it)

Be sure to check out my website!

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Step 1: Making the Left Base

Picture of Making the Left Base

Just some structure...

Step 2: Gearing Part One

Picture of Gearing Part One

Be sure to make spacers etc. correct

Step 3: Gearing Part Two

Picture of Gearing Part Two

Step 4: Gearing Part Three

Picture of Gearing Part Three

Step 5: Gearing Part Four

Picture of Gearing Part Four

Step 6: Gearing Part Five

Picture of Gearing Part Five

Step 7: Gearing Part Six

Picture of Gearing Part Six

Here's also the motor

Step 8: Gearing Part Seven

Picture of Gearing Part Seven

Step 9: Attaching the Gear Box

Picture of Attaching the Gear Box

Few, finally gearing is finished!

Step 10: Making the Right Base

Picture of Making the Right Base

Step 11: The Entrance Track

Picture of The Entrance Track

Step 12: Connecting...

Picture of Connecting...

Step 13: The Gate

Picture of The Gate

Step 14: The Lower Arm

Picture of The Lower Arm

Step 15: Back Counterweights Tower Shaft

Picture of Back Counterweights Tower Shaft

Step 16: Front Counterweight Tower Shaft

Picture of Front Counterweight Tower Shaft

Step 17: Arm Tower

Picture of Arm Tower

Step 18: The Exit Track

Picture of The Exit Track

Step 19: The Arm Connection

Picture of The Arm Connection

Step 20: The Arms

Picture of The Arms

Now you'll make both arms, later on you'll modify them as they are unique in the model.

Step 21: Modifying the First Arm

Picture of Modifying the First Arm

Step 22: Modifying the Second Arm

Picture of Modifying the Second Arm

Step 23: Making the Top Wheels

Picture of Making the Top Wheels

Step 24: Making the First Counterweight

Picture of Making the First Counterweight

All Y-connectors are just clipped onto the end of the rods.
The string between the counterweight and the connections (without the used for the knots) is 1.43 meters (56.2992126 inch).

Step 25: Inserting the First Counterweight

Picture of Inserting the First Counterweight

The red string indicates where it will go as it is hard to see.

Step 26: Some More Modifications for the Second Arm

Picture of Some More Modifications for the Second Arm

They weren't possible to make before

Step 27: Making the Second Counter Weight

Picture of Making the Second Counter Weight

It is actually the same as with the first one, just somewhat shorter.
The string is 86 cm long (33.8582677 inch).

Step 28: Inserting the Second Counterweight

Picture of Inserting the Second Counterweight

Step 29: Finishing the Crank

Picture of Finishing the Crank

Almost finished!

Step 30: Finished! + Troubleshooting

Picture of Finished! + Troubleshooting

Wha, you'r finally finished!
Sorry for all mistakes I made, making the instruction was REALLY complicated. I also had many problems with uploading so many files at the same time to ibles, and then ibles also didn't sort the files correctly in my image library....
Well, but here it is!
If you add a picture below of your model I'll ad it to this step!
Be sure to comment, rate and SUBSCRIBE!

Check out my Website for more cool stuff!

My arms go as choppy down as in the beginning of the vid! - Make sure that all the string is correctly on the wheels, that was also my problems with the first clip and I was to lazy to re-film :P

The balls won't enter the lift as the gate won't go up! - be sure that that thingy in the back of the gate is in the correct position.

The balls fall back down when going to the next arm! - The 'trapdoors' have to be swiped over the hole.

My model doesn't look somewhat correct! - Make sure that every rod is attached correctly.

My model looks very crashed! - Next time don't through it out of the top window of a three story building!


fredrayn (author)2015-11-06

hi there had to make a few adjustments to the lift because did not have the big wheels but it works well

Sorunome (author)fredrayn2015-11-06


I used the wheels as a counter-weight :)

LindaP5 made it! (author)2015-08-16

I made it but very confuse with the string. Can you draw in a paper so that i can follow easilier? Thank you very much

Sorunome (author)LindaP52015-08-17

I can do that once i'm back home end of this month ;)

LindaP5 (author)Sorunome2015-08-18

Yes, I can wait, thank you!

Sorunome (author)LindaP52015-09-02
LindaP5 (author)Sorunome2015-09-18

Thank you!

Sorunome (author)LindaP52015-09-18

Glad I could help!

Gargamel-Knex (author)2014-10-16

"Oh, and the first one to make a piece count will earn a patch :D"

It's a little late, but I will a patch XD

Pieces count coming soon :D :D

Sorunome (author)Gargamel-Knex2014-10-16

Better late than never ;)

cooljupjup (author)2014-02-14

Hey Sorunome!, i like the lift! i`ve build it it does work now! im going to use it in my ballamchine! :D

Sorunome (author)cooljupjup2014-02-14

yay, awesome :D

knexman32 (author)2013-03-28

is it ok if you use the smaller wheels instead of the bigger ones?

Sorunome (author)knexman322013-03-28

I would not recommend that as I use the wheels as a counterweight and the bigger ones weigh more. Maybe you could make your own counterweight that is about same heavy.

knexman32 (author)Sorunome2013-03-28

ok thx

sandroknexmaster (author)2012-12-11

Hey sorunome!

This is a very good lift: high, good looks, works good,...
So... I've built it!
I know you didn't invent it, it was Shadowman.
But congrats for rebuilding it from the vid and making good instructions.
I'll use it in my next ball machine, where I'm currently working on.
Here are some photo's, if you want you can add them to the last step of this instructable.

Awesome! i am always so glad when people make my stuff....

Me too! :)

knexpert#10829476 (author)2012-08-10

Very cool!

thanks! :D

Purple Waffles (author)2012-05-13

Very cool. I would make a piece count, but I'm too busy planning where this could go on my ball machine :P

Sorunome (author)Purple Waffles2012-05-13

Haha, xD
Why won't you come on skype?

Purple Waffles (author)Sorunome2012-05-27

Sorry for late reply. idk just dont find myself needing/wanting to use it.. too busy with school, knex and MINECRAFT!!!

Sorunome (author)Purple Waffles2012-05-28

no! Not minecraft! It's evil! :P

Purple Waffles (author)Sorunome2012-08-04

MUAHAHAHAHA. BUT i am working on a new machine... pictures shall come soon.

Sorunome (author)Purple Waffles2012-08-04

Cool, can't wait for pics!
BTW, why are you never on skype? :P

Purple Waffles (author)Sorunome2012-08-04

Am i supposed to be? :P

Sorunome (author)Purple Waffles2012-08-05

/me runs

Purple Waffles (author)Sorunome2012-08-05

Too busy playing... MINECRAFT!!!!!!!

Don don don...

Lol i dont see the need to be on skype :P but dont worry i am still working on my next project :) but i need a name for it

Sorunome (author)Purple Waffles2012-08-05

minecraft is evil :P

And call it project next
/me runs

Purple Waffles (author)Sorunome2012-08-06

Lol its addicting. And what does /me runs mean?

Sorunome (author)Purple Waffles2012-08-06

Replaxe /me with sorunome
so i run faaaaaaaaaaaaar away :P

Purple Waffles (author)Sorunome2012-08-07

-_- lol

Sorunome (author)Purple Waffles2012-08-05

minecraft is evil :P

And call it project next
/me runs

jameshond (author)2012-06-03

work this lift with new style balls

Sorunome (author)jameshond2012-06-03

I think so, not sure as I don't have the newer balls.

jameshond (author)Sorunome2012-06-03

okey thanks !!!

Tornado96 (author)2012-05-11

OH THE GROANING! :-( That's the only negative I see! Great job man!

Purple Waffles (author)Tornado962012-05-27


That is what she said.

Im sorry i had to say that.

Tornado96 (author)Purple Waffles2012-05-28

Not really necessary is it? :-/

Sorunome (author)Tornado962012-05-28

it is :P

Tornado96 (author)Sorunome2012-05-28

Uh.... Ye of immature minds....

Sorunome (author)Tornado962012-05-29


Sorunome (author)Purple Waffles2012-05-28


Sorunome (author)Tornado962012-05-12

Haha, thanks. :P

The Jamalam (author)2012-05-16

An excellent mechanism, my only concern is that the motor sounds strained. I can imagine with the mass of the arms this will be hard to avoid but perhaps if you were to guide the pulley so that the line of action was parallel with the ground you'd get a more even lift? Just a thought.

Sorunome (author)The Jamalam2012-05-16

I don't quite get what you mean but I bet if you'd make this lift twice and connect them correctly it'll run very smooth.
Oh, and thanks :)

Shadowman39 (author)2012-05-11

Cool! How did you make the degree sign in the intro? I still think the counterweight should be heavier (the one that moves faster). Is that the tall ball machine I see to the left of it in the video? :-)

Sorunome (author)Shadowman392012-05-11

And there are a lot of reasons why the faster counterweight isn't heavier, in first place because it won't work anymore.
Yep, that is the fast ball machine.
And in the german keyboard layout, dunno if it is the same with the us one, I get the degree symbol by hitting shift and the key below Esc.

Shadowman39 (author)Sorunome2012-05-11

Oh the degree sign is also in the rich editor. :-P We don't have degree signs on our keyboards. 

About This Instructable




Bio: You can find me over on Knexflux!
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