When we spec'd out our laser cutting capability, the decision wasn't complicated — but it was deliberate. The Mitsubishi ML3015eX-F60 Plus at 6kW on a 60"×120" bed is the right machine for the work we do. Here's the reasoning.
The Core Difference Between Fiber and CO2
CO2 lasers have been the industry standard for decades. They work well on thick carbon steel, produce good cut quality, and the technology is mature. But they have a fundamental limitation: the CO2 laser wavelength doesn't couple efficiently with reflective materials like aluminum and copper, and it won't cut titanium effectively.
Fiber lasers use a different wavelength — roughly 1 micron versus 10 microns for CO2. That shorter wavelength is absorbed much more efficiently by metals, including the reflective ones CO2 struggles with. The result is a laser that cuts faster on thin material, handles aluminum and copper cleanly, and opens up titanium cutting that CO2 simply can't do reliably.
Why Titanium Capability Mattered to Us
We weld and machine titanium for aerospace and defense programs. Being able to cut titanium sheet and plate in-house — rather than outsourcing it — keeps our workflow integrated and our lead times shorter. A CO2 laser would have forced us to send titanium cutting out. The fiber laser eliminates that dependency.
Speed on Thin Material
For thin gauge carbon steel and stainless — under 1/4" — fiber lasers are significantly faster than equivalent CO2 systems. At 6kW, our Mitsubishi runs at cutting speeds that would require a much higher-power CO2 machine to match. For production runs of sheet metal parts, that speed difference is real throughput.
A fiber laser is a capital investment, not just in the machine but in the material capability it opens up. We bought this machine because of what it lets us say yes to, not just what it cuts faster.
The 60"×120" Bed
Bed size matters more than people expect. Full sheet capacity — 60" × 120" — means we can cut a full 5' × 10' sheet in a single setup. For armor plate blanks, structural panel components, and large fabrication parts, that means no piecing, no seams, no additional handling. Parts that need a second setup on a smaller machine run in one shot on ours.
Operating Cost
Fiber lasers are more energy-efficient than CO2 — significantly so. The wall-plug efficiency of a fiber laser is roughly 25-30% versus 10-15% for CO2. Over the life of the machine, that's meaningful. There's also no laser gas consumption on a fiber system, which is a recurring cost on CO2 that adds up.
What It Means for Our Customers
For defense and aerospace programs that include titanium, exotic alloys, or aluminum alongside steel — our laser handles the full material mix. Parts don't go out for cutting and come back. The cut quality feeds directly into our downstream welding and machining operations, with consistent edge quality that makes fit-up faster and more repeatable.