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How to build a simple robotic arm from Lego Mindstorms NXT?

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Picture of How to build a simple robotic arm from Lego Mindstorms NXT?
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Today, I will tell you how I built my robotic arm from Lego Mindstorms NXT.

In fact, I wanted to build a robotic tripod for my camera. I found out, that it's more difficult then it looks. After some experimenting I build this simple robotic arm.

I you want to build it too, you need:
- Lego Mindstorms NXT kit
- a computer
- time...?

There are only two rules you have to follow while building ANY robot:
1. rule: KISS (Keep it simple, stupid!);
2. rule: "The triple-F" rule a.k.a. FFF (Form following function!)

Step 1: Constructing the base

Picture of Constructing the base
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The base is probably the simplest part of the robot to build. It's just a platform from the robot to stand on. You have to make sure, that it's long and wide enough. The center of gravity must be somewhere on top of the base, if possible, in the middle. Else wise, the robot will fall.

The base (in our case) are just a few beams that support the robot. More advanced robotic arms have motors in the base. These motors than move the arm, without moving themselves. Usually, the base has a motor that rotates the arm, but my arm rotates itself.

You can be much more creative with the construction of the robot then I was.

Step 2: Building the "rotation module"

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This is one of my rare robots that are built from modules. My robotic arm has three modules; one of them is the "rotation module".

It's very simple. It rotates the arm left and right and supports the other two modules. It's based on Matthias Paul Scholz's 90 degree join at:
http://mynxt.matthiaspaulscholz.eu/robots/motor90/index.html
 
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gogoguy2 months ago

That is very cool!!

I'm so gonna build this! I plan on getting a NXT set in the next few months. So excited!
cerebender1 year ago
Did you use an education set to build this? Because this can't be built with a 2.0 set without a ton of modifications or by trying to use some Technic parts. Also, the link you provided is now invalid, so there is no way to follow those instructions. It would help if you put a disclaimer at the beginning of the instructable to let people know this is old and not complete, and what kind of Mindstorms set is needed (or added-on parts) in order to build it. That way, no one will start building this and then realize they can't complete it (like I just did).
cerebender1 year ago
Did you use an education set to build this? Because this can't be built with a 2.0 set without a ton of modifications or by trying to use some Technic parts. Also, the link you provided is now invalid, so there is no way to follow those instructions. It would help if you put a disclaimer at the beginning of the instructable to let people know this is old and not complete, and what kind of Mindstorms set is needed (or added-on parts) in order to build it. That way, no one will start building this and then realize they can't complete it (like I just did).
klarsen33 years ago
where do you get that little thing that powers it and has the controls on it
its the mindstorms ntx brick, its the "brain" for the whole robot, it comes with the nxt kit
FrodoandSam2 years ago
I feel like this would probably be more fitting for the NXT Builder's Log, but it is definitely AAAWWWEEESSSOOOMMMEEE!!!
jwoo20233 years ago
man! I have a NXT 2.0 not a 1.0
ㅠ_ㅠ
me 2 :(
u can still do just change programming
pretty simple to correct all u have to do is use the weird longshortturnlittlepiecethingymaajigy for claws if u gmd lol u probally wont understand what im sayig. just basically make a few subs for pieces
no its just that the parts used are different, sound sensor, gears, claws...
well not claws because we have the angle thing.
There are no detailed instructions
I want the lego nxts *sob so bad *cry
agreed *cry*
yeah... *sob*
me too *waaaah*
I'm still sobbing ;'(
*cry* too expensive :(
yeah sob sob
I have one
yeah every one but me seems to....
lol
you shut up! jk, jk
NEVER!!!!!!! lol
now you shut up!!!. jk again....
what does JK meanbut, NO YOU SHUT UP! lol lol lol lol
JK means just kiddin'. SHUT THE POO UP ALREADY!!!!
Naw....SHUT THE CRA~(lol) UP!
Wow. You people post 5000 comments telling each other to shut up? RAISE MONEY AND BUY AN NXT (OR 2 LIKE ME) AND PLAY WITH IT!!! IF YOU NEED HELP JUST ASK ME! I mean it.
I HAVE ONE!!! PLEASE DONT USE CAPS WITH EVERY WORD YOU USE!1!!
and i dont need hepl
You definetely need some spelling help... Anyhow, I was ticked off from you two spamming the comments.
Congratulations for replying to a 5 month old post. Even then, that was a while ago.
Do I get a medal? :3 Anyway, I was off Instructables for a while.
STOP CRIING AND BY ONE
i have it ;)
Im geting it
I've got two :P plus an rcx 2.0 :D
Ooh, beat me at the RCX! I have two NXT's as well, retail version. There are also a bunch of 'em at my school. Teacher lets us play with 'em every Thursday.
copycat ! our i used to be in a team that competed world wide, we placed 3rd in the Netherlands :D the worldwide competition is called first Lego league, ask your teachers if you may compete with a team at school, u might get lucky :D
That's actually what I was talking about. I've been doing it for the past year, actually. Last year's challenges were easy, this year's ones are HARD! Oh, and guess what our team name is.
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