PCBee CNC

PCBee
A small CNC machine for milling PCBs
It can also handle engraving and light milling tasks.

Batteries not included. ⚡

⚠ Warning

While the machine design is pretty much complete, the BOM is not fully finalized and some parts are still missing, like a proper enclosure for electronics.
Screws, nuts, and other fasteners are not yet listed.

You can download the CAD files and check the assembly to see the exact fasteners required.

VISIT THE GITHUB -click here-  AND GET THE MOST UP-TO-DATE FILES! VISIT THE GITHUB -click here-  AND GET THE MOST UP-TO-DATE FILES! 

📐 Machine Specifications

Total Machine Size:

Y: 290 mm

X: 285 mm

Z: 250 mm

Work Area:

X: 120 mm

Y: 120 mm

Z: 25 mm (Z travel — not including endmill)

🧰 Bill of Materials (BOM)

Printed Parts:

Can also be laser-cut, milled, or even cut by hand. DXF files are provided.

Extrusion:

6 × 2020 120 mm (or 3 × 2040, or 2 × 2060) → Bed

2 × 2040 220 mm → Chassis

2 × 2020 200 mm → X-axis

Smooth Rods:

2 × Ø10 mm × 220 mm → X-axis

2 × Ø10 mm × 237 mm → Y-axis

2 × Ø8 mm × 100 mm → Z-axis

Bearings:

8 × LM10UU → X and Y axis

4 × LM8UU → Z axis

2 × 908 Ball Bearings → X/Y leadscrew support (optional, but looks cool)

Other:

3 × Shaft Couplers (avoid the "spring" type — can cause backlash)

2 × TR8 Leadscrews 210 mm + Anti-Backlash Nuts → X and Y axis

1 × TR8 Leadscrew 100 mm + Normal Nut → Z axis

⚡ Electronics

1 × Arduino UNO

1 × CNC Shield

1 × 40×40 12V Fan

1 × 775 Motor + ER11 Collet (avoid the "drill chuck" type)

2 × Relay Boards (optional, used to toggle spindle/aspiration via G-code)

3 × Stepper Drivers (A4988 recommended for low cost)

3 × NEMA 17 Stepper Motors

1 × 12V "Super Slim LED Strip" PSU (~300W is plenty; some 775 motors can also work with 24V)