Slide 003: Material Settings Reference and Optimization¶
Slide Visual¶
Slide Overview¶
This slide provides practical settings references and teaches students the systematic process for determining optimal laser parameters for any material. Settings are starting points โ every material, machine, and even batch of material may require fine-tuning through test cuts.
Instruction Notes¶
Settings Reference for 60W CO2 Laser¶
Cutting Settings:
| Material | Thickness | Power (%) | Speed (mm/s) | Passes | Air Assist |
|---|---|---|---|---|---|
| Cast Acrylic | 3mm | 65-75 | 10-15 | 1 | ON |
| Cast Acrylic | 6mm | 85-95 | 5-8 | 1 | ON |
| Birch Plywood | 3mm | 70-80 | 12-18 | 1 | ON |
| Birch Plywood | 6mm | 95-100 | 5-8 | 1-2 | ON |
| MDF | 3mm | 60-70 | 15-20 | 1 | ON |
| Cardboard | 2mm | 30-40 | 25-35 | 1 | ON |
| Leather | 2mm | 40-55 | 15-20 | 1 | ON |
| Cotton Fabric | 1mm | 15-25 | 30-40 | 1 | ON (low) |
| Paper | 0.2mm | 10-15 | 40-60 | 1 | OFF or low |
Engraving Settings:
| Material | Power (%) | Speed (mm/s) | DPI | Depth Result |
|---|---|---|---|---|
| Wood (light mark) | 15-25 | 300-400 | 300 | Surface color change |
| Wood (standard) | 30-50 | 200-300 | 400 | 0.3-1mm depth |
| Wood (deep) | 60-80 | 100-200 | 300 | 1-3mm depth |
| Acrylic (mark) | 15-25 | 300-400 | 400 | Surface frost |
| Acrylic (deep) | 40-60 | 150-250 | 400 | 0.5-2mm depth |
| Leather | 15-30 | 300-400 | 300 | Surface darkening |
| Anodized Aluminum | 30-50 | 200-300 | 400 | Layer removal |
| Glass | 40-60 | 150-250 | 300 | Surface fracturing |
Important: These settings are for a 60W laser. Scale proportionally for different wattages (40W needs ~50% slower, 80W can go ~30% faster).
Systematic Settings Optimization Process¶
When processing a new material or a material you haven't used before:
- Research: Check the machine's material library, manufacturer documentation, and community databases for recommended starting settings
- Test cut: Use a small scrap piece (50mm ร 50mm). Run a test matrix with 3-5 power levels and 3-5 speed levels
- Evaluate: Check for complete cut-through, edge quality, charring, and kerf width
- Optimize: Select the lowest power / highest speed combination that achieves complete cut-through with acceptable edge quality
- Document: Record the final settings in the lab's material settings database with date, material source, and thickness
Scaling Settings for Different Wattages¶
Settings are proportional to laser power. To convert settings from one wattage to another: - Same power percentage: Keep percentage the same, adjust speed - Speed scaling: New speed = Published speed ร (Your wattage รท Published wattage) - Example: 60W settings say 70% power at 15 mm/s. For a 40W laser: 70% power at 15 ร (40/60) = 10 mm/s
Environmental Factors Affecting Settings¶
- Humidity: Wet materials need more power (energy goes into evaporating water first)
- Temperature: Cold materials may need slightly more power
- Tube age: Older tubes output less power โ gradually increase power % to compensate
- Optics cleanliness: Dirty mirrors/lens reduce delivered power โ clean before adjusting settings upward
Key Talking Points¶
- Published settings are starting points, not gospel โ always run a test cut on scrap material before your actual workpiece
- The optimal setting is the minimum power / maximum speed that achieves a complete, clean result โ more power than necessary creates more charring and wider kerf
- Document every successful setting in the lab database โ this institutional knowledge saves hours of test-cutting for future users
Learning Objectives (Concept Check)¶
- [ ] Students can look up and apply starting settings for common materials
- [ ] Students can perform a systematic test-cut optimization process
- [ ] Students can scale settings between different laser wattages
Last Updated: 2026-03-19