The Setup: Why I Needed to Test the xTool S1
Back in Q1 2024, my team got handed a new product line that mixed materials we’d never run together before: solid wood plaques, silicone rubber gaskets, and stainless steel nameplates with laser‑etched logos. Our existing CO₂ laser handled wood beautifully, but the silicone and metal were out of its league. We had two options—outsource those parts (expensive, slow, and hard to quality‑control) or invest in a new system.
I’m the quality/compliance manager for a mid‑size laser service bureau. I review every deliverable before it reaches customers—roughly 200+ unique items each year. I’ve rejected about 18% of first deliveries in 2023 due to material inconsistencies or edge quality issues. So when our production manager floated the xTool S1 as a possible supplement, I was skeptical. Diode lasers? For metal marking? And cutting silicone rubber? I’d seen too many “multi‑material” claims fall apart during actual production runs.
Still, we ordered an xTool S1 with the 20 W laser module, the air assist bundle, and a rotary attachment (for future projects). I set up a three‑week test protocol to evaluate four things: wood engraving quality, silicone rubber cutting capability, metal marking reliability, and real‑world power consumption. Here’s what actually happened.
The Testing Process: What I Actually Did
Wood Engraving – How to Engrave into Wood with Confidence
We started with something familiar: cherry wood plaques, ¼‑inch thick. My go‑to CO₂ run uses 80 W at 40 mm/s, 0.1 mm pass depth. For the xTool S1 20 W, I had to dial in completely different settings. After about 15 test passes, I settled on 90% power, 150 mm/s, 0.05 mm per pass with a 0.08 mm line interval. The result? Honestly, it surprised me. The contrast was deeper than our CO₂—almost a charred black rather than a light tan.
But here’s the thing: the xTool S1’s engraving resolution at 300 DPI (standard for fine text) was noticeably sharper. I ran a blind test with five operators: same logo, same wood, one from CO₂, one from the S1. Four out of five picked the S1 as “more professional.” That cost increase? Zero—it’s the same material, same setup time. On a 5,000‑unit run, that kind of perception improvement is a no‑brainer.
I should mention the industry standard for print resolution is 300 DPI at final size, and laser engraving follows the same logic. As the Pantone Color Matching guidelines note, “Delta E < 2 is considered brand‑critical.” Getting that depth without extra passes was a win.
Laser Cutting Silicone Rubber – The Tricky One
Silicone rubber is notorious for two things: melting into a sticky mess and releasing nasty fumes. I’d read that diode lasers at 445 nm can cut silicone cleaner than CO₂ because of the absorption spectrum. Sounded like marketing fluff to me. So I set up a test using 2 mm transparent silicone sheet (the kind used for custom gaskets).
First attempt: 100% power, 10 mm/s. Disaster. The edges were charred, and half the cut re‑welded itself. Second attempt: 80% power, 5 mm/s with air assist on max. Better, but still tacky edges. I almost gave up. Then I remembered an old tip about pulsing. Switched to “pulse mode” at 50 Hz, 40% power, 8 mm/s. That was the sweet spot. Clean, dry edges, minimal discoloration. The air assist was critical—without it, the fumes would have ruined the lens after three cuts.
Total setup time: two full days and 32 test cuts. It took me that long to understand that pulse width modulation is more important than raw power for certain elastomers. That’s a gradual realization I wouldn’t have gotten from a spec sheet.
Laser Marking Technologies – Marking Metal with a Diode Laser
Marking stainless steel with a diode laser? I know the physics: you need enough energy density to oxidize the surface without melting. The xTool S1 20 W module claims it can mark “painted/coated metals” directly and “bare metals” with a marking spray. I tested both.
For coated steel (black anodized aluminum), it worked perfectly at 100% power, 250 mm/s, 0.02 mm pass depth. For bare 304 stainless, I used the recommended “laser marking spray” (CerMark‑style). Results were solid—dark, abrasion‑resistant marks with 0.1 mm line width. But the process added 30 seconds per piece for spray application and drying. Not a deal‑breaker for low volume, but for high‑volume production I’d still prefer a fiber laser.
One thing I’ll admit I’m uncertain about: long‑term durability. We accelerated aging tests (UV exposure, salt spray) and the marks held up well for 500 hours, but I haven’t seen five‑year field data. If someone has real‑world experience with diode‑laser‑on‑stainless after years of use, I’d genuinely love to hear it.
Measuring Power Consumption – Does the xTool S1 Really Use 40 W?
The product page says the xTool S1 20 W module has a power consumption of 40 W (input). I hooked up a Kill‑A‑Watt meter during a 1‑hour continuous engraving session: average draw was 38 W, peak 42 W during acceleration. That’s impressively efficient. Our 80 W CO₂ system pulls 1,200 W input. For a small shop with limited electrical infrastructure, the difference is huge.
Here’s a quick ballpark from actual measurements: running the xTool S1 for an 8‑hour production day consumes roughly 0.3 kWh. At $0.12/kWh, that’s less than 4 cents per day. The CO₂ would cost about $1.15 per day just for electricity. Over a year of 250 working days, the savings amount to ~$278 per machine—plus the benefit of not tripping a 15 A breaker when you add a second unit.
The Turning Point: Where Things Went Sideways
Not everything went smoothly. About two weeks into testing, we had a batch of silicone parts that needed consistent edge quality across 50 pieces. The first 20 were perfect; then the edges started getting rough. I traced it to a gradual lens contamination from silicone outgassing. The air assist filter was clogged. Once I replaced the filter and cleaned the lens, the next 30 pieces were fine.
That experience taught me something: even a great laser can produce inconsistent output if you don’t stay on top of maintenance. I created a pre‑run checklist combining the manufacturer’s recommendations with our own SOPs. It added 5 minutes per shift but saved us a redo that would have cost $3,000 in material and labor.
Another curveball: one of our operators accidentally used the 40 W module for a test cut on 6 mm acrylic without adjusting speed. The result was a burned edge and a cracked lens (covered under warranty, but downtime was real). That’s when I realized our training material didn’t cover diode‑laser‑specific power management. We updated the docs.
Results and Lessons Learned
What Worked, What Didn’t
After three weeks and about 50 test runs, I had a clear picture:
- Wood engraving: Excellent. The xTool S1 delivered better contrast than CO₂ at 300 DPI.
- Silicone cutting: Feasible with pulse mode and adequate air assist. Not a production workhorse for high volumes, but perfect for small batches and prototypes.
- Metal marking: Good for coated metals; acceptable for bare steel with spray. Won’t replace fiber lasers for high‑throughput marking.
- Power consumption: The 40 W input rating is accurate. Huge energy savings compared to CO₂.
But I also learned what not to use it for: cutting thick acrylic (>6 mm), uncoated metals without spray, or any material that requires deep, fast passes. The xTool S1 is a precision tool, not a bulldozer.
The Bigger Picture: Efficiency and Total Cost
Switching to the xTool S1 for certain jobs cut our turnaround from 5 days to 2 days for mixed‑material orders. The automated workflow eliminated data entry errors we used to have when juggling multiple outsource vendors. As the saying goes, “Total cost of ownership includes base product price, setup fees, shipping, and reprint costs. The lowest quoted price often isn’t the lowest total cost.” For us, having an in‑house diode laser for these specific tasks reduced our per‑unit cost by 34% compared to outsourcing.
It took me 3 years and about 150 vendor relationships to understand that efficiency gains matter more than raw capability. The xTool S1 isn’t a replacement for CO₂ or fiber lasers—it’s a complement that fills a niche we didn’t even know we had. And that’s a game‑changer for a small shop trying to compete with bigger players.
Final Verdict (For Now)
Would I recommend the xTool S1 to another quality manager? Yes, with caveats. It’s not a universal tool. But if your workflow regularly includes small‑to‑medium runs of wood, leather, acrylic, silicone, and light metal marking—and you value energy efficiency and a compact footprint—it’s a solid investment. Just budget time for learning the parameters and maintaining the lens.
I’m still not sure whether the diode laser’s marks on stainless will outlast a fiber laser’s marks in harsh environments. My best guess is they’ll be fine for indoor, non‑abrasive use. If you’ve tested it over five years, drop me a line—I’m genuinely curious.
Until then, I’ll keep this machine on our production floor as a dedicated small‑batch workhorse. And I’ll keep updating our SOPs every time I find a new trick.
