How to choose the power of a laser cutter for materials – metals, wood, plastics?
Learn how to select the right laser cutting power for cutting various materials: metals (steel, aluminum, copper), wood, and plastics (acrylic, PVC). Learn about the key technical parameters that influence the quality, precision, and efficiency of laser cutting!
How to choose the power of a laser cutter for materials – metals, wood, plastics?
Wprowadzenie
Selecting laser power is one of the most important aspects of the laser cutting process. Properly adjusting the cutter's parameters allows for high edge quality, precise cutting, and minimal material loss. In this article, we explain how to select the right laser cutter power for specific types of materials: metals, wood, and plastics.
Why does laser cutter power matter?
Laser power directly affects:
- cutting speed,
- quality and smoothness of edges,
- the ability to process materials of various thicknesses and structures,
- energy efficiency and production costs.
Too little power can cause undercuts and uneven edges, while too much power can cause burns or deformation. Therefore, it's crucial to match the laser power to the specific material being processed.
Selecting laser power for metal cutting
Laser cutting of metal (steel, aluminum, brass, copper) requires higher power compared to wood or plastic. The thickness of the sheet metal is crucial:
- Structural steel: up to 5 mm – 500–1000 W; over 10 mm – 2000 W and more,
- Aluminum: 800–3000 W depending on the thickness and quality of the surface,
- Copper, brass: materials that are more difficult to process – precise adjustment and testing recommended, power from 1000 to 3000 W.
For industry, fiber laser cutters are the most frequently chosen due to their high efficiency in cutting metals.
Selecting laser power for wood
Wood and wood-based materials (plywood, MDF, OSB) require lower power but precise adjustment to avoid burning:
- Thin plywood (1–3 mm): 40–60 W,
- Solid wood (4–8 mm): 80–150 W,
- Thick boards (10+ mm): 150–200 W or more.
It's recommended to use low power for engraving and high power for deep cutting. Optimal settings also depend on the type of wood (pine, oak, beech).
Power selection for plastics
Plastics such as acrylic (PMMA), PVC, PET or polycarbonate, are very sensitive to temperature and melting:
- Acrylic up to 5 mm: 30–60 W,
- Acrylic 10+ mm: 80–100 W,
- PVC: difficult material - may emit toxic fumes; use a fume hood and test the potency.
In the case of plastics, cooling and adequate ventilation of the workstation are very important.
Summary – how to choose laser power?
The choice of laser cutting power depends on:
- type of material (metal, wood, plastic),
- thickness and structure of the raw material,
- expected cutting quality,
- purpose: cutting vs engraving.
To achieve the best results, it's worth conducting trial tests and using the power tables recommended by laser manufacturers. Carefully selected parameters will optimize the cutting process, reduce material waste, and increase production profitability.
Are you planning to buy a laser cutter? Contact us – we will help you choose the right power and device model tailored to your needs.