Choosing between CNC milling and laser cutting is one of the most common decisions when producing acrylic parts. Both technologies have their strengths and limitations. This guide helps you pick the best method for your project.
Detailed Comparison
| Parameter | Laser CO2 | CNC Milling |
|---|---|---|
| Processing type | 2D only (cut, engrave) | 2D and 3D (pockets, chamfers) |
| Precision | ±0.1 mm | ±0.05 mm |
| Edge quality | Polished (ready to use) | Matte (requires polishing) |
| Max thickness (PMMA) | 20-25 mm | Unlimited |
| Polycarbonate (PC) | Not recommended | Yes |
| Speed (simple shapes) | Very fast | Slower |
| 3D features | Not possible | Yes (pockets, chamfers, threads) |
When to Use Which?
Recommendations by Project Type
Flat display components, POS stands
→ LASER (speed, polished edge)
3D letters, chamfered edges
→ CNC (3D machining)
Enclosures with threads and mounting holes
→ CNC (threading, precision holes)
Polycarbonate safety guards
→ CNC (laser can't cut PC)
Prototypes and small batches
→ LASER (low unit cost)
Thick acrylic blocks (>25mm)
→ CNC (no thickness limit)
We Often Combine Both
Many projects benefit from using both technologies:
- LED lightbox: Front cut by laser (polished edge for even lighting), sides CNC milled (chamfers, LED grooves)
- POS display: Main panels laser cut, mounting details (threads, pockets) on CNC
- Device enclosure: Front panel laser cut with engraving, body CNC milled with electronics pocket
Summary
Choose laser when you need:
- Flat 2D parts with polished edges
- Fast prototypes
- Combined engraving and cutting
- PMMA up to 20mm thick
Choose CNC when you need:
- 3D features (pockets, chamfers, undercuts)
- Materials thicker than 25mm
- Polycarbonate or other laser-incompatible materials
- Threads or precision holes
Not Sure Which Technology to Use?
Send us your design file - we'll recommend the best approach.
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