Can a Laser Cutter Cut Metal? A 6-Step Vetting Checklist From $11,200 in Wasted Budget

What This Checklist Is For

If you're shopping for a laser cutter and metal is on your material list, read this before you sign anything. I've bought four laser machines over the past seven years. Two of them couldn't do what the sales rep promised. Total wasted budget: around $11,200, plus two missed deadlines and one very unhappy client.

This checklist has six steps. Run all six before you buy. It'll take you maybe two weeks. That's cheaper than a $4,000 mistake.

Quick background: I'm a production supervisor for a small fabrication shop. We handle signage, custom parts, and occasional metal engraving jobs. I maintain our equipment vetting checklist — mostly because I got tired of learning things the hard way.

Step 1: Confirm the Laser Type vs. Your Material

This is the step most people skip. They see "laser cutter" and assume it cuts everything. It doesn't.

Here's the short version:

• CO2 lasers (most cheap laser cutters) cut wood, acrylic, leather, glass. They can mark coated metal with a spray, but they don't cut raw metal. At all.
• Fiber lasers cut metal. This is what you need for steel, aluminum, brass, copper.
• Diode lasers can engrave some metals (with mixed results) but rarely cut them at production thicknesses.

When I first started buying equipment in 2018, I assumed any laser cutter with 60W+ could handle thin aluminum. I was wrong. That $2,300 CO2 machine couldn't touch a 1mm aluminum sheet. The rep said "it can do metal with the right settings." The "right settings" turned out to be a marking compound and a very optimistic interpretation of the word "cut."

Look, I'm not saying budget machines are always bad. I'm saying they're the wrong tool for metal. If metal is your primary material, you need a fiber laser. Full stop.

Trotec's product line splits this cleanly — their Fiber series handles metal, their Speedy CO2 series handles organics. That's not a coincidence; it reflects the physics.

Step 2: Send Your Actual Material for a Test Cut

This is the step that would have saved me $2,100.

Don't trust demo videos. Don't trust spec sheets. Don't trust the sales rep's "yeah, it'll do that."

Send a sample of your exact material — same alloy, same thickness — to the vendor. Ask for a cut sample and a marked-up edge quality report. If they can't do this, walk away.

In September 2022, I ordered a fiber laser based on a demo video. The video showed 1mm stainless steel. My actual job was 3mm aluminum. The machine arrived, we set it up, and it struggled. Not "needed tuning" struggled. "This is the wrong machine for this job" struggled. $2,100 in return shipping and restocking fees later, I learned my lesson.

Test on your material. Not theirs.

Step 3: Verify Power vs. Thickness With Real Numbers

"It's a 1kW fiber laser" sounds impressive. But what does that actually cut?

Rough guidance from published manufacturer specifications (verify with your specific vendor, because alloy and edge quality change these numbers):

As a general rule for fiber lasers: 1kW handles roughly 1mm stainless steel or 2mm mild steel at production quality. 2kW gets you to ~3mm stainless. 4kW+ for 6mm and above. These are approximations — alloy composition and edge quality requirements shift the math considerably.

Most people ignore the difference between engraving depth and cut-through. Engraving 0.1mm into metal is a completely different operation than cutting through 3mm. A machine that engraves beautifully might not cut at all.

When you're evaluating a machine, ask for the cut chart. The specific one: material type, thickness, power setting, speed, and edge quality. If they don't have one, that's a red flag.

Step 4: Check the Software's Metal Parameter Library

Software matters more than people think. A machine with no parameter library means you're starting from scratch every time you change materials.

Ask: does the software have tested parameters for your alloy and thickness range? Can you save and share parameter sets across machines?

Trotec's JobControl software includes material templates, but even there — verify the library covers your specific metals. If you're cutting Inconel or titanium, double-check. Standard mild steel and aluminum are usually covered. Exotic alloys might not be.

The hidden cost here: if you're dialing in parameters from scratch, that's 4-6 hours per material. Multiply that by five materials and you've lost a week of production time.

Step 5: Calculate True Cost (Not Just Purchase Price)

The purchase price is the smallest number in the equation.

Add these:

• Consumables: lenses, nozzles, protective windows. Cheap machines often use proprietary parts with high replacement costs.
• Service: local support? Parts availability? Response time?
• Training: how long until your operator is productive?
• Downtime: if the machine breaks, how fast can you get it running?

I once calculated that a "cheap" $8,000 laser cutter cost more per year in consumables than a $13,000 machine with standard parts. The lens alone was $600 and needed replacement every three months. The $13,000 machine used $200 lenses that lasted six months.

Trotec Laser GmbH, for instance, offers laser foil and other consumables through their material catalog. That doesn't make them cheaper — it makes the supply chain simpler. One vendor, one support line, one set of parameters. In a production environment, that simplicity has real value.

Do the two-year math. It's not close.

Step 6: Confirm Support Response Time (This Is Where Deadlines Live)

Here's the thing: when you have a rush job, a machine that's "probably fixable next week" is worse than useless.

In March 2024, we had a fiber laser go down with a lens failure. We had a $15,000 order due in five days. Our service contract cost us $400 extra annually for guaranteed 48-hour response. The tech was on-site the next morning. We made the deadline.

Without that contract, the estimated response time was "7-10 business days." We would have missed the deadline. The penalty clause on that order was $3,500.

I used to think rush fees and premium service contracts were just vendors padding their margins. Then I saw the operational reality of expedited service. It's not about speed. It's about certainty.

When Trotec Laser GmbH lists a response time, verify what that actually means in your region. A global brand with local service techs is worth more than a cheaper machine with no local support.

Common Mistakes to Avoid

Three things I see people get wrong, including myself:

1. Confusing "metal engraving" with "metal cutting." These are different capabilities. A machine that engraves stainless steel might not cut through 1mm aluminum. Check both specs.

2. Skipping the test sample. This is the step most people ignore because it takes time. It's also the step that catches 90% of problems. Spend the week.

3. Buying for the job you might get instead of the job you have. "We might do more metal work in the future" is not a reason to buy a fiber laser. Buy for what's on your schedule now.

The Bottom Line

Can a laser cutter cut metal? Yes — if it's the right laser type with enough power and the right software support. But most cheap laser cutters can't, and the sales material won't always tell you that.

Run the six steps. Send your material. Ask for the cut chart. Calculate the two-year cost. Confirm the service response time in writing.

And when you're under deadline pressure: pay for certainty. The premium is almost always cheaper than the miss.