So, you're looking at the xTool S1. Maybe you've seen the videos of it slicing through acrylic like butter, or engraving a detailed design onto a leather wallet. It looks impressive. But then the questions start. Can it actually cut metal? What about engraving glass with the 40W module? Can I engrave a firearm? And is this really the best machine for what I need?
Let's cut through the marketing. The honest answer to all of these is: it depends on your specific scenario. There's no one-size-fits-all 'yes' or 'no'. Based on my experience setting up small workshops and troubleshooting laser projects, here's a breakdown of the four most common scenarios, so you can figure out which one applies to you.
Scenario A: The 'I Need to Cut Metal' Person
You want to know if the S1 can handle metal sheets for your product line.
This is the most common question I get. And the short answer is: No, not in any practical sense.
The xTool S1 is a desktop CO₂ and diode laser system. It's fantastic for wood, acrylic, leather, paper, fabric, and even stone. But metal? That's a different beast. A desktop CO₂ laser (even the 40W) struggles to cut through anything thicker than thin foil or very light-gauge aluminum. It will mark anodized aluminum (by burning off the anodized coating) and it can mark some metals with a specialized marking spray, but a clean, through-cut of a 1/16th-inch steel sheet is not going to happen.
If you absolutely need to cut metal, you're looking at either a much higher-powered CO₂ laser (100W+) or a fiber laser. A desktop unit like the S1 isn't the right tool for that job. In my first year, I made this exact mistake with a different desktop model—I assumed 'laser' meant 'can handle anything'. Cost me a week of headaches and a few ruined pieces of metal.
My Verdict: If your core product requires cutting metal sheet, this is not your machine. The S1 excels at marking and engraving metal (with the right prep), not cutting it.
Scenario B: The '40W Glass Engraving' Hobbyist
You bought the 40W module specifically for engraving glassware for gifts or a side business.
Here's the thing: the 40W diode module is incredibly versatile, but glass is a tricky material. The issue isn't power—it's wavelength. Standard diode lasers (445nm) don't interact well with clear glass because they pass right through it. The CO₂ laser (10.6µm) is much better for this because it's absorbed by the glass surface, creating a frosted, sandblasted look.
So, does the 40W module work? Sort of. But with a key limitation.
You can engrave glass with the 40W diode, but it requires a very specific technique. You need to apply a thin, wet layer of something like dish soap or a specialized marking compound to the surface. The laser then burns that layer, and the heat transfer creates a micro-fracture in the glass, leaving a mark. It's not as crisp or consistent as a CO₂ laser's result, and it won't be as deep. It's more of a 'surface etch'. For a simple wine glass with a name on it, it can look decent. For a highly detailed, deep-etched pattern on a thick crystal tumbler? I wouldn't bet on it.
While I've seen some impressive results online (and I've managed a few decent tests myself), I've never fully mastered this technique. If someone has a foolproof process for a 40W diode on clear glass, I'd genuinely love to hear it. But for most people, you'll want the CO₂ module for reliable glass work.
My Verdict: For occasional, shallow engraving on clear glass with the right prep, it's workable. But for professional, consistent results, you need the CO₂ module. I wouldn't rely on the 40W diode for a production run of glassware.
Scenario C: The 'Laser Engraving Firearms' Professional
You want to offer custom engraving on metal parts, like firearms, as a service.
This is a high-stakes scenario. Firearms are not just a material; they're a regulated product with potential safety implications. We're talking about marking steel, hardened steel, and sometimes aluminum alloys.
The xTool S1, especially with the 20W or 40W module, is actually quite capable of marking firearm components. It can create a deep, dark, permanent mark on steel by using a process called laser annealing. You're not engraving deep grooves; you're changing the surface texture and color by heating the metal. It's often used for serial numbers, logos, and intricate designs. I've seen a colleague use a similar desktop laser to do serial numbers for a small run of custom 1911 grips, and the results were solid.
But—and this is a big but—there's a massive caveat.
You need to be incredibly careful with the heat. A powerful laser on a small, thin part can warp it or cause heat damage. You also need to know your materials. Different steels behave differently. And of course, you need to comply with all local, state, and federal firearms regulations. This isn't a DIY weekend project; it's a professional application.
My Verdict: Yes, the S1 can mark firearm components. But only if you have the technical knowledge, the right safety protocols, and the legal compliance in place. If you're a hobbyist without that experience, I'd start with scrap metal parts before ever touching a firearm.
Scenario D: The 'Is This the Best Laser Engraving Machine?' Buyer
You're comparing the S1 to other desktop machines and want to know if it's the right choice.
This is the most common question, and the answer changes depending on who you are.
You are a small business owner making custom products:
This is the S1's sweet spot. The modularity is a game-changer. You start with a CO₂ module for wood and acrylic, then add the 40W diode for metal marking. The ability to swap modules without buying a second machine is a huge advantage. For a workshop that needs to turn around 20 custom keychains and 5 engraved wine glasses in a day, it's a fantastic fit.
You are a full-time creator with a high-volume shop:
Here, you might hit the S1's limits. The work area is small (around 15x15 inches) compared to larger gantry lasers. If you're doing production runs of large signs or cutting thick acrylic sheets regularly, you'll want a bigger, more powerful machine. The S1 is a great tool, but it's not a production workhorse.
You are a beginner on a tight budget:
The S1 is a premium product. It's not cheap. The 20W kit alone costs a significant amount. For a beginner, you might be better off with a simpler, less expensive diode laser to learn the basics on. A $400-600 laser can teach you everything you need to know before you invest $1,500+ in a more versatile system like the S1.
I tested 6 different desktop laser options before settling on our current setup. The S1 was the winner for our specific need—versatility for a small batch, custom-order shop. For a different volume or budget, a different machine might have been the better call.
So, how do you know which scenario you're in?
Ask yourself these three questions:
- What is my primary material? If it's metal sheet cutting, skip the S1. If it's glass engraving, get the CO₂ module. If it's wood, acrylic, and metal marking, the S1 is a strong contender.
- What is my volume? For a small business with custom orders, it's great. For a high-volume production shop, you need more.
- What is my budget? The S1 is an investment. Be honest about whether you're at that level yet.
There's no perfect, universal answer. But I hope this breakdown helps you find the one that's right for your scenario. And honestly, if you're still unsure, starting with a cheap diode laser to just get your feet wet is never a bad idea.
