DARwIn-OP brackets and parts

by I-Bioloid, published

DARwIn-OP brackets and parts by I-Bioloid Jul 1, 2011

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He is video of the robot walking.


He is a video that shows the process I have made so far.




These are parts to the DARwIn-OP. Which is a open hardware and software research robot.

CAD files are here:


Robotis website:

http://www.flickr.com//photos/[email protected]/sets/72157627088031578/show/

http://www.flickr.com/photos/[email protected]/5623759896/

Videos of brackets being printed

Check out page 62 of Robot Issue 38 January/February 2013.

My article on this project is:

DARwIn-OP Cloning 3D printing—a case study—by Michael Overstreet

You can also check out Make Magazine volume #34, page 66 for more details on how I made the clone.


Video of all of the brackets printed out.


DARwIn-OP RoMeLa website:

RoMeLa (Robotics & Mechanisms Lab),
Virginia Tech

First videos of the robot in action.





I should add that we are creating our STL files in AutoDesk 123D. I am starting to like this software more and more!


Here is a link to my instructables guide on how I made the DARwIn-OP clone for more information.


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Thanks a bunch m8, I really needed parts after the "accident"

Comments deleted.

can u PLEASE make a normal servo to this dynamixel servo case, i can not afford this servos.:(

You should try this robot:



I have seen all your projects but i find this robot more interesting and challenging than the other and i have also found a way to make it play football by using an arduino and a pixy (tracking camera) http://www.amazon.com/Pixy-CMUcam5-Smart-Vision-Sensor/dp/B00IUYUA80 but i have to 3d design a normal servo to dynamixel servo case,but i have a problem finding the screws can u help?

Sounds like you need to design a whole new robot? Normal servos don't have the enough torque for the weight of the DARwIn-OP.

I am going to use a metal geared servo. I think it can handle that. http://www.banggood.com/4X-TowerPro-MG996R-Digital-Metal-Gear-Servo-For-RC-Model-p-961727.html what do you think? where did you bought the screws?

Thank you for your support. :)
What servo can i buy exept dynamixel?

I found another robot but i will use the arm of this robot yhanks ron

I'm going to build the MINI, I can use the small servo's for it.
Thanks Ron

Yes, the mini is cheaper and easier to both print and build. Way do you not use the XL-320s as they are a great servo?

This is real neat ad would be fun if I could afford the proper servo's?
But alas I can't So I will stop building this..
it's just to much trouble trying to use standard servo's on it.
Thanks any way, Ron.

Hello, I keep finding I don't have all the files???
Can you help?
I need upper chest bracket #4
parts #9L and #11 and #20
Upper leg actuator mount #14
Head bracket #1
also camera front head cover part #20 ???
Can you upload these parts. ???
Thanks Ron.

Hello, to answer you question am I using MX-28s???
NO I'm not, I'm using standard servo's I can't affor $200+ for the MX=28's
I can't believe they cost that much???
Anyway Thanks Ron.

Ok? I am working on Darwin from this download at thingiverse. But I am at a loss???
It seems that I don't have all the parts???
Auctuator bracket
arm acutuator mout
angled auctuator bracket
leg auctuator mount
Aucuator mount.
and other files???

I can't seem to find these files???
What am I not doing??? or don't understand??? Please help??? Thanks Ron.

Comments deleted.

Okay just uploaded parts 3 and 5

Thanks I'll check them out. Ron.

Those parts are very small and hard to print but I will upload them. Are you going to use MX-28s?

Did you see the video of my clone walking? Huge advancement for me!

yes I saw the red one, is that the one. But I didn't see it walk, I'll have to check that out.
MX-28's ? where would I get these?
Thanks for the reply. Ron.

Do you are using arduino to control it?

Comments deleted.

where can i buy the screws?

mcmaster carr or grainger has them usually

McMaster Carr is great but I had to buy 50 to 100 of every screw. Which got expensive. Robotis needs to come out with a screw kit.

are these parts scaled properly? i imported the head file and it says its only 10mm wide?

At one time they were but not know? I uploaded the same files that I used to print my DARwin-OP. I will fix and reload them.

Can you let me know from each items, how may time printing is required, please?

At least two of each.

Go to my instructable and downloaded all the assembly manuals for a detail parts list.


What parts are needed?
What size and strength of servos?
How many?

 The robot is design to use 20 DYNAMIXEL MX-28T. They are about 220.00 USD a piece. Yes I know they are expensive but they are awesome servos.

The UP! can now print with a .15 mm layer height! The covers of the OP are looking awesome now. Did not think that I could print them out! It just takes a long time for each print!

Will have a very cool update to this project in a few weeks!!!

I love the project but those servos are REALLY expensive

219.00 USD for a state of the art servo is not bad =-X

i just finished my phd in neural computation specializing in developmental knowledge representation and sensorimotor grounded language acquisition, and continually through my phd i kept thinking of how my project would benefit from having access to "real" sensiromotor data from a small humanoid robot instead of the simulated data i was using (and, of course, you have to start this way -- but it's nice to make the transition at some point). i was trying to price one of these out the other day, and really the $10k price tag seems like it's ALL servo. what makes them $220 each? is it the torque, or the digital interface with feedback? could you take a much less expensive but similarly torque-speced servo, and add on some small boards of your own design to give them the same functionality for a quarter of the price?

Peter have you priced robotic servos lately? Here is a write up on what makes the MX-28s so cool! http://www.hizook.com/blog/2011/06/16/new-robotis-dynamixel-servos-mx-28-sport-360-degree-rotation-and-4x-angular-resolutihttp://www.hizook.com/blog/201...

As for a cheaper version. Me and a lot of other people are working on that!! =-X


They are talking about making a DARwIn-OP with AX-12A servos! =-X