Hardware

The hardware section covers the mechanical design, manufacturing, and assembly of the STM32-Quadcopter frame.
Both CNC-cut carbon-fiber and 3D-printed variants are supported, using the same mounting geometry.

Frame Design and Resources

All 3D and 2D models are publicly available from:

MakerWorld – Quadcopter 3D-Printable STM32 MCU Model
Recommended for downloading pre-sliced 3D print profiles and previewing assemblies.
GitHub Repository – /3.Models Directory
Contains source CAD files (STEP, STL, DXF) and mechanical drawings for fabrication.

Each repository provides:

2D/3D Components (STL / STEP) — printable or editable for additive manufacturing.
Assembly References (STEP, PDF) — showing part orientation and mechanical stack order.

Use the CAD assembly as the authoritative reference for hole spacing, standoff height, and overall mechanical alignment.

Frame Isometric View

Frame Front View

Carbon-Fiber Components

Carbon Fiber Cut Layout

All carbon-fiber cut patterns are located under /3.Models/CF/.
When preparing for CNC cutting, ensure proper dogbones and edge tolerances are added for manufacturability and ease of assembly.

For best results, use 1.5 mm or 2 mm carbon-fiber sheets and double-sided tape during cutting to prevent delamination.

ABS / 3D-Printed Components

3D Printed Parts

Use carbon-fiber reinforced filaments (PET-CF, PAHT-CF, PA6-CF, or PPS-CF) for structural parts such as arms and center plates.
Non-critical covers or spacers can be printed in ABS or ASA.

Recommended nozzle size: 0.4 mm – 0.6 mm with a 0.2 mm layer height. Use 100% infill for load-bearing parts.

Mechanical Components BOM

Item Name	Qty
M3 Hex Nut	19
M3 × 12 mm Button Head Bolt	2
M3 × 20 mm Button Head Bolt	7
M3 × 20 mm Socket Head Bolt	6
M3 × 30 mm Socket Head Bolt	16
M3 × 35 mm Button Head Bolt	3
M3 × 40 mm Button Head Bolt	1
Nylon Spacer 3-5-11.2	8
Nylon Spacer 3-5-20	16
Nylon Spacer 3-5-30	4
Nylon Spacer 3-5-5	2

All fasteners use metric M3 hardware. Stainless or black-oxide steel screws are recommended for structural strength.

Assembly Reference

For complete mechanical orientation, download the full assembly STEP file from MakerWorld .
This includes exploded views and correct spacer stacking for each section of the frame.