Robotic Arm

Robotic Arm


After doing Kawal's tutorial bot I decided to move onto something slightly different. This is my attempt at a robotic arm with 4 degrees of freedom (all servo rotation). 

First thing I have done is plan the structure of the arm. It is going to be built from MDF (all I had, others with better tools would probably use plexiglass or something to effect). It has a base which turns and then will have a 3 other servos to control the other dimensions. 

It is based on this arm being sold by lynxmotion for around $250


Task list

-order servos yes

-plan and cut out main structure yes

-build the base


-code (inverse kinematics angry)

-maybe add sensors??


Structure Cutouts

How I aim to fit it together. The pencils are used instead of long doweling

I will add some more photos as I go along. Wish me luck!



Gadget-Fan's picture

Good luck with the project .

Good luck with the project . Please keep us informed.

prat's picture


Its nice to see MDF being used for a robotic arm.Usually Mdf's in robotics field are used in CNCs

Pencils ?yes

kimbimbi's picture

No CNC for me, nor any type

No CNC for me, nor any type of computerised cutting. I'm pretty sure all my projects will be cheap wood and a jigsaw. The pencils are somewhat offputting but actually perfect for a small support like that. I am quite a low budget guy.

kawal's picture

Hi Joe, Good start with the

Hi Joe,

Good start with the arm.What servos are you planning to use ?




kimbimbi's picture

I'm using Towerpro sg5010 for

I'm using Towerpro sg5010 for the 'elbow', 'wrist' and the rotating base.

For the main 'shoulder' I'm going to use a hi-tec hs-755HB because I'll probably need more torque.

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