When I put the xTool S1 purchase request in front of our finance team, the first question wasn't “what's a diode laser?” It was “why aren't we outsourcing this?” Fair question. I handle purchasing for a mid-sized company—the person who signs off on equipment and fields requests from operations and finance alike. Six months and roughly a hundred projects after that purchase order, I've got practical answers. This FAQ covers the questions buyers actually ask, minus the marketing language.
1. Can you laser cut metal with the xTool S1?
Straight answer: no, not at any practical metal thickness. A 40W blue-diode laser won't cut steel, aluminum, or sheet metal. The demo videos of diode lasers slicing through soda cans? The can is ultra-thin aluminum that heats and fails—it's not a clean cut. If someone tells you otherwise, that's a red flag.
What the S1 can do is mark and engrave certain metals:
- Coated metals (powder-coated tumblers, anodized aluminum, painted steel): the laser removes the coating and leaves a clean, permanent mark.
- Bare stainless steel: possible with marking spray or careful slow passes, but you get a dark oxide mark, not a deep etch.
- Thin-gauge metals in very limited cases—still not a production cut.
For actual metal cutting, you need a fiber laser—a completely different machine in a completely different price bracket. Honestly, I was one of those people who hoped a $1,500 tool could replace a $10,000 one. It can't. What it can do is still pretty impressive.
2. Is the xTool S1 a CO2 laser?
No. It's a diode laser, specifically a 455nm blue-diode machine. The “xTool S1 CO2 laser” confusion makes sense though—xTool sells CO2 machines too (like the P2 series), and model numbers blur together when you're new to lasers. But the difference matters:
- Diode (the S1): compact, modular, can mark some metals directly, cuts wood and thin acrylic well.
- CO2: better for cutting thick wood and acrylic, but it basically can't mark bare metal without special prep—the 10.6μm beam reflects off the surface instead of being absorbed.
Why does this matter? Because most S1 buyers want metal marking and wood cutting in one machine. That combination is exactly what a diode does better than CO2 in a small shop. When we were comparing machines, the cost analysis said the bigger CO2 unit was a better “value per watt.” My gut said the S1 was a better fit for our actual workload. Six months in, the gut call was right—the CO2 unit would've spent most of its time powered off.
3. Does the xTool S1 do color engraving?
This is the most misunderstood phrase in laser marketing, so let's define it before answering. The S1 will not do the rainbow metal-coloring effect that a MOPA fiber laser produces in the $4,000+ range (as of early 2025, based on my own sourcing research). Don't expect full-color photos on metal out of the box.
What the S1 can do:
- Color toning on titanium and stainless steel—with carefully dialed-in low speeds and varying power, you can create oxide layers that show straw, blue, purple, and gold tones. Titanium is more forgiving; stainless takes patience. It's slow, fiddly, and absolutely requires a test grid before a real batch. Creator-grade, not production-grade.
- Two-tone and high-contrast work—engraving through anodized or powder-coated materials to reveal the base layer underneath.
- Color-filled engraving—laser the design, then fill it with paint or lacquer. This is a legit production technique that works on wood, acrylic, and metal.
That covers a surprising number of customer requests. If someone asks for “laser color photo on metal,” that's where I draw the line and explain the hardware difference. (And honestly, if that's a core need, a UV printer might be the better investment anyway.)
4. Can the xTool S1 engrave spring steel?
Yes, with two conditions that I'd call mandatory: preparation and restraint.
Spring steel is a high-carbon steel with various finishes—bare, oiled, oxide-coated. A bare, shiny spring-steel surface barely absorbs the diode beam, so your mark will be faint. The workaround is a marking spray (the dark sulfide-type coating) or engraving through an existing black-oxide finish. In our shop, we get excellent contrast marking spring clips by going through the oxide layer. For the most common spring-steel laser engraving jobs—part numbers, logos, inspection marks—surface preparation is the difference between a readable mark and no mark at all.
Now the restraint part, and this is where “prevention beats rework” kicks in: if the part is going to flex, do not deep-engrave it. A deep laser cut in a spring creates a stress riser, and the part can crack under load. Surface marking—removing coating or a shallow etch—is safe. Chewing a groove into it is not. Laser heat can also locally temper the steel, changing its spring properties. Test on a sacrificial part first. If the part is cheap, testing is a no-brainer. If it's expensive, it's even more reason to test.
5. Can the xTool S1 engrave Yeti tumblers? (Do I need a special machine?)
You don't need a “Yeti laser engraving machine,” because that's not a real category. You need a laser that can mark coated stainless steel—which the S1 does well—plus a rotary attachment.
A tumbler is curved, and the laser's focal point has to stay constant. Without a rotary, the engraving gets blurry at the edges and can scorch the coating. The S1's rotary bundle handles Yeti and most standard tumblers. One thing we learned the hard way: coating color matters. Dark powder-coats (black, navy) produce a bright silver mark with high contrast. Light and metallic coatings come out with less contrast. So confirm the effect on a sample before quoting a whole batch.
We had been outsourcing tumblers at $14 per unit, plus a $40 setup fee and shipping, with a 5–7 day lead time. (That's from the vendor quote we actually obtained in January 2025, so verify current rates—online engraving services all price differently.) My rough math says if we engrave 150 tumblers a year, the machine pays for itself versus the outsourced route. The bigger win isn't the money—it's the turnaround. When a colleague asks for 20 engraved products on Thursday for a Saturday event, an outside vendor can't help. The machine in the back room can.
Looking back, I should have ordered the rotary bundle with the machine instead of adding it two weeks later. Ended up paying a second shipping charge and waiting an extra week for a part I knew we'd need. Not our most expensive mistake, but it taught me to buy accessories in the initial order.
6. Should my company buy an xTool S1?
The bottom-line question. Here's my honest framework after months with the machine.
Buy it if your requests are mostly small-batch branded products—tumblers, awards, tags, keychains, prototypes—and you're tired of paying outside vendors for every single order. An in-house laser's value isn't just the cost per unit; it's the certainty. That near-miss with the marketing director's deadline is what sold finance more than any spreadsheet.
But budget for the real total cost: the machine, rotary bundle, air assist, enclosure and ventilation, marking spray, test materials, and time to learn the software. The machine price is maybe 60–70% of what you'll actually spend the first month. If you don't put that in the purchase request, finance will come back with questions. (Ours did.)
Don't buy it if you need to cut thick materials all day, need production-grade color on metal, or expect a one-day learning curve. It's a tool, not an appliance.
And before every batch—yes, every batch—run a test grid. It takes 15 minutes. Yes, you've done this material before. But coatings change, humidity changes, nozzles get bumped. The shops that skip the test are the ones redoing 40 tumblers on a Friday night. That's the most expensive 15 minutes you can skip.
That's the honest version after six months with the S1: specific limits, real capabilities, and a reasonable price tag for what it does. Keep the limits in mind, and the S1 earns its place on the bench.
