Atari & Firebee Shopping Trolley Key (Multi-Material)

A high-quality, ergonomic shopping trolley chip (23mm diameter) featuring the iconic Atari and Firebee logos. This project is specifically designed for multi-material 3D printers like the Flashforge Adventurer 5M Pro (AD5X) or printers equipped with an AMS/MMU.

🚀 Overview

This OpenSCAD project generates a "key-style" trolley chip. Unlike a simple round coin, this design includes a 45mm handle for easy insertion and removal from trolley slots. It supports up to 4 different colors in a single print.

Features

Front Side: Deep-engraved Atari Logo.
Back Side: Deep-engraved Firebee Logo.
Handle: Customized "logo_text.svg" inlay and a 5mm keychain hole.
Parametric Design: Fully adjustable via OpenSCAD.
Optimized for AD5X: Designed to be printed with the first layer facing the bed for a perfectly smooth logo finish.

🛠 Print Settings (Optimized for 0.4mm Nozzle)

To achieve the best results with the fine logo details, use the following settings:

Parameter	Recommended Value
Layer Height	0.15mm (0.2mm for First Layer)
Wall Loops	4 (Important for handle strength)
Top/Bottom Shells	5
Infill	30% (Gyroid or Honeycomb)
First Layer Speed	15–20 mm/s (Slow is critical for inlays)
Z-Hop	0.4mm
Prime Tower	Enabled (Prevents color bleeding)

📖 How to Use

1. Preparation

Place your SVG files in the same folder as the .scad file:

logo_atari.svg
logo_firebee.svg
logo_text.svg

2. Exporting STLs

In OpenSCAD, use the export_mode variable to render and export the four individual parts:

chip -> base.stl (The main body)
atari -> inlay_atari.stl
firebee -> inlay_firebee.stl
text -> inlay_text.stl

3. Slicing (Crucial Step)

Import all 4 STLs into your slicer at once.
When prompted: "Load as a single object with multiple parts?", select YES.
Ensure the parts are merged/grouped correctly in the object list.
Check the Preview: Look at Layer 1. Ensure the slicer isn't "over-printing" the logos with the base color. The base should leave exact gaps for the inlays.

4. Color Selection

For maximum contrast, we recommend:

Base: Black or Dark Grey
Atari Logo: Red or White
Firebee Logo: Pink or Orange
Handle Text: Light Blue or Lime Green

📸 Screenshot Mode

The code includes a built-in toggle for documentation. Set show_screenshot_view = true; in OpenSCAD to see a perfectly centered, side-by-side view of both the front and back of the key.

📜 License

This project is licensed under Creative Commons - Attribution - Non-Commercial - Share Alike (CC-BY-NC-SA).

Attribution: You must give appropriate credit.
Non-Commercial: You may not use the material for commercial purposes.
ShareAlike: If you remix, transform, or build upon the material, you must distribute your contributions under the same license.

Created with OpenSCAD - Optimized for the Atari & Firebee community.

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