Glowforge Aura Wattage: A Budget CO2 Laser Reality Check

Start with the material, not the wattage

I've managed equipment and supply budgets for small production shops for six years. When someone asks me about buying a desktop laser, the first question is usually about power. 'How many watts is the Glowforge Aura?' It's a fair question, but it's not the smartest starting point.

The Glowforge Aura laser engraver uses a 40W CO2 laser tube. That puts it in the same class as other budget CO2 lasers, not in the range of industrial fiber lasers or plasma cutters. But wattage only tells you so much. What really matters is what you plan to cut, how much of it you need to produce, and what your total cost will be after you buy the machine.

Scenario 1: You are making small-batch products from wood, acrylic, or leather

If you're engraving wood signs, cutting acrylic display pieces, or marking leather goods, the Glowforge Aura is a reasonable choice. It's easy to use, the software handles focus for you, and there is a library of free designs. For that workflow, 40W is enough because you are mostly engraving and cutting thin material.

I went back and forth between the Aura and a higher-wattage model for almost two weeks. The Aura won on price. The bigger machine won on speed. I ended up choosing the Aura because our real bottleneck was operator training, not watts. Once the team learned the material settings, the machine kept up with our order volume.

Scenario 2: You are cutting thick material all day

If your shop regularly cuts half-inch hardwood or quarter-inch acrylic, the Aura will feel slow. A 40W CO2 laser can handle those cuts, but not at production speed. In that case, I would save up for a more powerful Glowforge model or another higher-wattage CO2 laser. Buying a budget machine and then upgrading six months later is rarely the cost-saving move it looks like.

I've watched that mistake happen. The 'cheap' machine costs less upfront, but the redo and downtime cost more than the upgrade. When I analyzed our own spending, the first-year cost of our laser setup was about 1.5 times the machine price. That included ventilation, test materials, and replacement parts.

Scenario 3: You are cutting metal

Here is where I have to set a boundary. A desktop CO2 laser is not a metal cutter. You cannot use a Glowforge Aura to cut 1/8-inch steel, and I would not trust anyone who tells you otherwise. If you need to cut steel plate, a hand held plasma cutter is the budget-friendly tool for that job. It won't engrave wood or acrylic, but it will cut metal that no budget CO2 laser can touch.

I do not mean an industrial plasma table—well, not the six-foot CNC kind. I mean a basic hand held plasma cutter and a compressor. It's a completely different category, and that's fine. The vendor who says 'this isn't our strength' is more honest than one who promises a desktop laser can replace every workshop tool.

Can you laser etch plastic?

Yes, you can laser etch plastic. Acrylic and many engineered plastics etch cleanly. But the word 'plastic' is too broad. ABS tends to melt. Polycarbonate usually turns yellow or brown. And PVC or vinyl should never go into a CO2 laser because they release chlorine gas, which damages the machine and is dangerous to breathe. Glowforge's own material guidelines do not support PVC. That is one of those rules you do not break.

So glad I checked the material data sheet before ordering a batch of potential parts. I was one email away from assuming the supplier's 'plastic sheet' was acrylic. It was not. That would have been a very expensive way to learn a lesson.

If you need to test a plastic part, cut a small sample at low power and check the result. Does the surface stay clean? Does it smell like burning tires? If the answer is no on the first, stop and identify the resin.

Glowforge Aura wattage: what the spec does and does not tell you

The 40W rating is the laser tube power. It is not the cutting power at the material surface. Speed, focus, air assist, and material all change the result. A well-tuned 40W machine can engrave faster than a poorly-run 60W machine. That's why I compare published material settings and cutting thickness charts instead of relying on a single wattage number.

As of January 2025, Glowforge publishes material settings for the Aura in its design app. Those settings are more useful than any spec sheet. Use them as your real reference. For engraving quality, think in DPI as well as watts. A 40W laser at 300 DPI can produce a sharper mark than a 60W laser at low resolution. The 300 DPI baseline is the same one commercial print shops use, so it's a useful starting point.

How to make a smart budget CO2 laser decision

There is no universal answer, but the decision gets easier if you ask these questions:

• What materials will you actually use? If it's wood, acrylic, and leather, a 40W CO2 laser is worth considering. If it's steel, skip the laser and look at a hand held plasma cutter.
• What volume? For one-off pieces, the Aura's ease of use beats raw speed. For daily production, you need a machine that can run all day without constant cleaning.
• What does the total cost look like? Include ventilation, test material, replacement tubes, and time spent learning. The sticker price is only the beginning.

I'd rather work with a specialist that knows its limits than a generalist that promises everything. That is the same for a laser vendor and the same for your own tool decisions.

Oh, and one more thing: the Glowforge Aura's cloud-based software is a big convenience, but it also means the machine depends on an internet connection. If your shop has unreliable internet, factor that into your decision.

If you're asking 'can you laser etch plastic?' the answer is yes, with the right resin. If you're asking whether the Glowforge Aura is a good budget CO2 laser, the answer depends on your materials and volume. And if you're trying to cut steel, stop comparing lasers and look at a hand held plasma cutter. Knowing what a tool cannot do is part of the job.