Glowforge Pro: Wattage, Bed Size, and Cutting Acrylic for Valentine's Gifts

If you're setting up a Glowforge Pro for a small business, school, or makerspace—and you're staring at the spec sheet wondering what actually matters—this checklist is for you. I manage purchasing for a 30-person design firm. In early 2024, we bought a Glowforge Pro for our model shop. Since then, I've probably run close to 400 jobs on it—maybe 360, I'd have to check—mostly wood engraving, acrylic cutting, and the occasional custom Valentine's gift run. This is the 5-step workflow I wish someone had given me on day one.

Step 1: Know the Two Specs That Actually Matter—Wattage and Bed Size

The Glowforge Pro is one of the most searched laser engraving machines for wood and acrylic, but two numbers should drive your decision:

Glowforge Pro wattage. The Pro has a 40W CO2 laser tube. That puts it at the upper end of "desktop" lasers, but it is not industrial. According to the official Glowforge spec page (glowforge.com, accessed January 2025), the Pro's laser is rated at 40W. It will cut through 1/4" acrylic cleanly and engrave wood quickly. But don't walk into this thinking it will cut steel or thick aluminum. It won't. If your shop specializes in metal fabrication, this is the wrong tool—a fiber laser is what you actually need. That's not a knock on the machine; it's just physics.

Glowforge Pro bed size. The engraving area is roughly 20" x 11". That's enough for a 20" long sign, a 12" wide cutting board, or a small plaque. The physical bed is larger, but the laser can only reach that highlighted rectangle. I accidentally learned this when I designed a 21" long piece and had to tile the cut into two halves—a mistake that cost me a half-sheet of birch plywood. In other words: think in terms of the 20" x 11" work area, and you'll be fine.

One thing that surprised me: the "wattage" and "bed size" specs are linked. A 40W tube with a 20" bed means longer cutting times for anything larger than a few inches. When we do batches of 30 engraved wood keychains, the job runs about 40 minutes. It's not a production machine, but for low-volume, high-variation work, it's the right fit. The surprise wasn't the speed. It was how much time I spent designing around the bed size.

Step 2: Pick Your Material the Right Way (Wood vs. Acrylic)

People ask me: "Can the Glowforge Pro cut wood and acrylic?" Yes. The better question is "which kinds?"

For laser engraving machine for wood jobs, we stick mostly to Baltic birch plywood in 1/8" or 3mm thickness. It engraves a clean dark brown and cuts with minimal charring. Maple veneer also prints well. We avoid MDF—the cut edge looks like burnt cardboard and the glue haze is a mess. And if you're ordering wood online, double-check that it's actually plywood, not solid wood with a surface coating; solid wood cuts inconsistently because of grain density.

For acrylic, the rule is simpler: use cast acrylic. Extruded acrylic is cheaper, but it tends to crack under laser heat and produces a shiny, less "frosted" edge. Cast acrylic cuts with that nice white edge that people associate with professional laser-cut products. Ask your supplier—or look for the label—so you know which type you have. "We don't care, they're both acrylic" is what a supplier once told me, and it's the kind of advice that costs you a batch. Here's something vendors won't tell you: the "acrylic" sold in most craft stores is extruded. Order from a plastics supplier that allows you to choose cast.

A quick note on boundaries: a 40W CO2 laser cannot cut metal. It can mark coated metal—we've done anodized aluminum keychains and engraved stainless steel tags with a marking compound. But it won't cut sheet metal. If your business plans to make metal parts, look at fiber lasers. That's not what the Glowforge Pro is for, and pretending otherwise is how people end up disappointed.

Step 3: Set Up the Machine for Cutting (Not Just Engraving)

If you only engrave wood, you can skip some of this. The moment you move to cutting acrylic, the setup changes. Here's my pre-cut checklist:

1. Turn on the air assist. The Pro has a built-in compressor, but it's weak. We added an external air pump—honestly, the size of a small shoebox—and it made a bigger difference than I expected. Without it, acrylic melts back together and leaves a ridge on the bottom edge.
2. Set the focus height properly. The Pro's auto-focus works well for flat material with the included "crush" plate. But when we use a honeycomb bed to lift the material, the focus distance changes. Learn how to do a manual focus with the included focus tool. It takes 15 seconds.
3. Ventilate. Acrylic produces hot, acrid fumes. Our Pro sits near a window vent with an in-line fan. I measured the air quality (yes, I did)—and trust me, you don't want that smoke in your workspace. If you smell it, it's already in your lungs.

Another detail most people skip: use the proofgrade material presets. In the Glowforge UI, there's a library of materials with correct speed/power settings. We still do a test pass on every new batch, because even same-labeled materials from different suppliers behave differently.

Step 4: How Do You Cut Acrylic Without Melting the Edges?

This is the #1 question people ask when they get a Glowforge Pro. Here's the exact workflow I use:

1. Leave the protective film on. Both sides. The film keeps smoke residue off the surface, and the laser cuts through it without issue. Removing it before cutting means cleaning soot off every piece.
2. Place the acrylic on a honeycomb bed. The honeycomb gives smoke an escape route and stops the reflected beam from scorching the back. If you put acrylic directly on the stock tray, expect burn marks on the underside.
3. Run a low-speed test line first. Set the power to 100% and speed to something like 180 (on the Glowforge slider scale). Cut a 1" line. If it doesn't cut through, lower the speed to 160. Test again. I usually find the sweet spot between 150 and 180 for 3mm cast acrylic, but I've seen batches that needed 130.
4. Watch the "passes" setting. For 1/4" (6mm) acrylic, you may need two passes. But each pass adds heat—and heat is what causes the edges to bubble. Better to slightly lower the speed for one pass than to run two faster passes. That's a lesson I learned the hard way: "just use two passes" sounds helpful until you see the melted edges.

Also, don't use "regular" acrylic without checking what it's blended with. Styrene and ABS are not laser-safe. If your supplier is vague, ask. If they say "not for laser," believe them. The smell is a warning sign; a burning plastic smell means something is wrong. We once tried a clear sheet from a hardware store—cut around 10 seconds too slowly—and it stunk up the entire office. Turns out it was impact-modified acrylic, which releases styrene fumes. Not worth it.

Step 5: Laser Cut Valentine's Gifts That People Actually Want

Okay, this is the fun part. After you can cut wood and acrylic reliably, Valentine's Day projects become a fantastic test of what the machine can do. Last February, we ran three types of gifts in two days:

• Wooden heart earrings. Cut from 3mm birch plywood at about half the speed of acrylic, then engraved initials with the "engrave" setting. Total time per pair: under 4 minutes. They sold well at a local craft fair—a nice side income for the studio.
• Tiny acrylic photo frames. We cut 3" x 3" clear acrylic squares and engraved a picture of the customer and their partner. The frosted edge from the cast acrylic made the frame look intentional. Embed a small magnet on the back—10 seconds of glue—and it becomes a fridge frame.
• Layered heart keychains. Two layers of acrylic or wood: a solid heart base and a thin top layer with a cutout shape. The trick is to engrave the top layer first, then cut both layers together in a single job. It sounds tricky, but the Glowforge UI makes it doable if you line up the shapes.

There's something satisfying about opening the lid and seeing a tray of finished hearts, all with that clean frosted edge. After the spec research, material testing, and setup troubleshooting—it works. The process is worth it.

Common Mistakes (and What I'd Do Differently)

Finally, a few things I wish I'd known before I bought ours:

• Don't skip the test cut. We once "saved time" by cutting a full sheet of acrylic without testing the new batch. Half the pieces didn't separate from the sheet, and we had to redo everything. A 30-second test would have caught it.
• Budget for the real cost. The Glowforge Pro price was around $5,900 on the official site when we bought it (based on US pricing as of January 2025; verify current rates). But you should also add roughly $300–$500 for an air pump, honeycomb bed, and possibly an external vent kit. The unit works out of the box, but the "works well" setup needs those add-ons.
• Set expectations based on the wattage. A 40W CO2 laser is a desktop tool. It's perfect for small-batch wood engraving and acrylic cutting. It is not a replacement for a $50,000 industrial laser. The buyers who get angry are the ones who expected more from the same wattage. Know what you're buying.

If you're budgeting for a school or small business, I'd also recommend checking the official Glowforge materials guide (glowforge.com/materials) before your first order. But the real teacher is your first 20 test cuts. Give yourself the time to burn through them.