How Can I Achieve Clean and Crystal-Clear Edges When Cutting Thick Acrylic?
Cutting thick acrylic with a laser can sometimes result in frosted edges or inconsistent cut quality. Following the recommendations below can help produce smoother, clearer edges and improve overall cutting performance.
What Lens Should I Use for Thick Acrylic?
- Use a 2-inch lens for acrylic up to 10 mm thick.
- Use a 4-inch lens for acrylic thicker than 10 mm.
A longer focal length provides better cutting performance and edge quality on thicker materials.
How Much Air Assist Should I Use?
Use only the minimum airflow needed to keep the lens clean.
Too much air assist can:
- Create a frosted or milky edge.
- Reduce cutting efficiency on thick acrylic.
Where Should I Focus the Laser?
After performing autofocus on the material surface, raise the worktable so the focal point is positioned approximately one-third to one-half of the material thickness below the surface.
This helps maintain consistent cutting performance through the entire thickness of the acrylic.
Why Is Exhaust Airflow Important?
A strong exhaust system helps:
- Remove fumes and combustible gases.
- Reduce flames on the underside of the acrylic.
- Improve edge quality and overall cutting results.
For best results, position the acrylic 2 to 10 cm above the grid table when possible.
What Resolution Settings Should I Use?
For thick acrylic, especially when cutting curves and circles:
- Set DPI to 1000 or higher.
- Set PPI to "X".
Higher resolution settings help produce smoother and more accurate cuts.
Summary
For the best results when cutting thick acrylic:
- Use a 4-inch lens for materials over 10 mm thick.
- Keep air assist to a minimum.
- Focus within the material, not just on the surface.
- Maintain strong exhaust airflow.
- Use 1000 DPI or higher for detailed cuts.
Following these practices can help achieve cleaner cuts and crystal-clear acrylic edges.