Does a Higher-Wattage Laser Always Mean a More Powerful Machine?
Summary
Only within one laser type. Among diode lasers, or among CO2 lasers, more watts means thicker cuts and faster jobs. Between types, the wavelength decides which materials the beam works on, so compare watts after you have chosen diode, CO2, or fiber.
Two 20W lasers on one machine
The xTool F1 Ultra carries a 20W blue diode and a 20W fiber laser. xTool assigns the fiber source to metal engraving and the diode to common materials such as wood and acrylic. The wattage is identical and the jobs are not.
Typical power ranges differ by type too. xTool's buying guide puts CO2 lasers at 40 to 150 watts. Diode machines come with modules such as 10W, 20W, and 40W. Fiber machines vary, and xTool's F2 Ultra, for example, uses a 60W MOPA source.
Within one type
xTool's S1 diode modules show what extra watts buy. In a single pass, the 20W module is rated for 10 mm of cherry and the 40W for 18 mm. The 40W spot is slightly larger, though, so for fine photo engraving the stronger module is not automatically the better one.
Those thickness ratings come from the manufacturer's own test conditions. LightBurn's Material Test burns a grid that steps through power and speed, plus interval, passes, or frequency on machines that support them, so you can line up the results on your own stock.
Sources
- xTool — xTool F1 Ultra
- xTool Support — xTool F1 Ultra User Guide
- xTool — Laser Engraver Buying Guide
- xTool Support — Processing Parameters for xTool F2 Ultra
- xTool Support — xTool S1 20W & 40W Laser Module Comparison
- LightBurn Documentation — Material Test
Specs and prices are as published on these pages on the date above and can change; check the manufacturer or retailer before you buy.