A small CNC machine for milling PCBs It can also handle engraving and light milling tasks.
Batteries not included. ⚡
While the machine design is pretty much complete, the BOM is not fully finalized and i still have to add some stuff like a proper enclosure for electronics. Screws, nuts, and other fasteners are not yet listed.
You can download the provided CAD files and check the assembly to get an idea of the exact fasteners required.
- Y: 290 mm
- X: 285 mm
- Z: 250 mm
- X: 120 mm
- Y: 120 mm
- Z: 25 mm (Z travel — not including endmill)
- Can also be laser-cut, milled, or even cut by hand. DXF files are provided.
- 6 × 2020 120 mm (or 3 × 2040, or 2 × 2060) → Bed
- 2 × 2040 220 mm → Chassis
- 2 × 2020 200 mm → X-axis
- 2 × Ø10 mm × 220 mm → X-axis
- 2 × Ø10 mm × 237 mm → Y-axis
- 2 × Ø8 mm × 100 mm → Z-axis
- 8 × LM10UU → X and Y axis
- 4 × LM8UU → Z axis
- 2 × 908 Ball Bearings → X/Y leadscrew support (optional, but looks cool)
- 3 × Shaft Couplers (avoid the "spring" type since those can cause backslash)
- 2 × TR8 Leadscrews 210 mm + Anti-Backlash Nuts → X and Y axis
- 1 × TR8 Leadscrew 100 mm + Normal Nut → Z axis
- 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 gcode)
- 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
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Design is intended for PCB milling, but it’s versatile enough for engraving and VERY light material removal.
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Many components can be swapped with equivalents depending on what you have on hand.
FEEL FREE TO FORK AND MODIFY!