Section outline

  • Intro to 3D Printing for Robot Chassis

    3D printing allows us to transform digital designs into real, physical components—perfect for robotics where custom parts like chassis, brackets, or mounts are needed. In this section, we will focus on how to prepare and print a basic robot chassis using a 3D printer. Whether you're using an FDM printer at home or accessing one through a makerspace, understanding the process is essential.

    • Why Use 3D Printing for Chassis?

      • Custom fit for motors, sensors, and battery compartments
      • Lightweight and durable designs
      • Low cost for prototyping and experimentation
      • Fast turnaround for iterations and improvements

      Materials Commonly Used

      • PLA (Polylactic Acid): Easy to print, biodegradable, ideal for beginners
      • ABS (Acrylonitrile Butadiene Styrene): Tough and heat-resistant, but requires better temperature control
      • PETG (Polyethylene Terephthalate Glycol): Balance of strength and flexibility, good for stronger parts

    • Key Design Considerations for a Robot Chassis

      • Component Layout: Plan where motors, sensors, and battery packs will go
      • Mounting Holes: Include correct hole sizes and positions for screws or clips
      • Cable Management: Leave slots or tunnels to route wires neatly
      • Accessibility: Make openings for switches, ports, or SD card slots
      • Strength: Use ribs or thicker walls in high-stress areas like motor mounts

      Basic Printing Workflow

      1. Export your 3D design from TinkerCAD or Fusion 360 as an STL file
      2. Import the STL into a slicer software (like Cura or PrusaSlicer)
      3. Choose settings like:
        • Layer height (e.g., 0.2 mm)
        • Infill (e.g., 20% grid)
        • Supports if there are overhangs
      4. Generate G-code and send it to the printer (via SD card or USB)
      5. Start the print and monitor the first few layers to ensure adhesion

      Example Print Settings Table

       

      Setting Recommended Value Explanation
      Layer Height 0.2 mm Balance between detail and speed
      Infill Density 20% Lightweight yet sturdy
      Print Speed 50 mm/s Safe speed for PLA
      Nozzle Temperature 200°C For PLA filament
      Bed Temperature 60°C Helps with bed adhesion

       

    • Tips for a Successful Print

      • Always level the bed before printing
      • Use blue painter's tape or glue stick for better adhesion
      • Watch the first 2–3 layers to avoid shifting or warping
      • If printing in ABS, ensure good ventilation and use an enclosed printer

      3D printing enables you to iterate and customize your robot chassis designs with ease. As your skills grow, you can create increasingly complex and professional parts tailored to your robotics projects.