20 Oct 2015
I've updated the design of the Single Servo Walker to make him walk better and also to make him easier to build.
The STL files are now included in this post! :D There are also detailed build instructions there.
The main updates are:
- A front guard piece has been added to keep the legs moving where they should
- The rear body has been lengthened to help with balance
As you can see in the latest video, this robot is able to walk forwards and turn using just one servo!! (The software needs more refinement as he turns quite aggressively at the moment!)
I'm still in love with this simple design. I guess I have a thing quirky robots! :) Will post again as he develops!
12 Oct 2015
After getting inspired by the amazing single-servo walking and rolling robots built by erco at www.robotrebels.org, I decided to have a go at designing my own version of the single-servo walker.
This is my initial attempt at this design. I managed to get it to walk, but it took some fiddling around with weight distribution, etc... However, I learnt a lot from this build, and will be refining the design to make an updated version. (I'll post the 3D printable files to Thingiverse after I get it right! :) )
Here's a closer look at the four 3D-printed parts:
The parts are pretty simple. The front legs just snap in using the pegs. Also, note that the front legs are passive! They move back and forth using to gravity.
Here are some assembly photos so you can see how the parts fit together.
In the video, I'm just using a basic test program to get it to walk forwards.
It should be possible to get this robot to turn left and right as well! I'll update the software to demonstrate that soon. :D
The passive legs in this design are based on the passive legs in erco's single servo walker. See a video of erco's fantastic design on YouTube here: http://www.youtube.com/watch?v=AR-4iANt37E
I'm really impressed and amazed at these one servo walkers!! I'll be doing more work on my design (both software and hardware). I want to get it walker better, and also want to demonstrate turning!