Beginning of Multi-Legged Robot Production /Raspberry pi pico /MS18

As I’m getting the hang of using a 3D printer, I’ve decided to start creating an original robot.

Completion Image

  • The project involves making a four-legged spider-type robot. 
  • The goal is to achieve something akin to Tachikoma from “Ghost in the Shell,” but the primary aim is to establish the basics. 
  • I intend to make it autonomously mobile by equipping it with distance sensors, among other things. Eventually, I want to implement features that support human life. 
  • The image is as per the video below.

Configuration Diagram

I’m planning to decide on the features as I build, but for now, the goal is to make it walk around a room without hitting obstacles. 

  • The size will be about small enough to fit on a palm, roughly 150mm x 150mm.
  • The entire casing will be made with a 3D printer. 
  • Eight servo motors are used in total, two for each leg. 
  • For the microcontroller, a Raspberry Pi Pico is applied.

Design of the Chassis

I’ve started with the legs. 

I designed three parts in Fusion360: the tip of the leg, the leg itself, and the connection to the main body. 

Though I say three parts, the leg and the body connection are designed as a common component, so in reality, there are only two distinct designs.

I’ve incorporated the following servo and horn, with thanks to the creator. I plan to use a servo called MS18.

Miuzei サーボモーター「MS18」 - 火玉屋.BOOTH - BOOTH
格安マイクロサーボモーター「MS18」の3Dモデリングデータです 3DCADモデリングにご活用ください 手動で測定していますので、正確でない箇所があります

I’ve also started on the body, and it’s in the picture, but I’ve managed to print it with the 3D printer.

Next, I guess I’ll move on to circuit design and get the legs moving.

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