xtool S1 Color Engraving & Infrared Laser: What I Learned the Hard Way in QA

Look, I'm the guy who signs off on every xtool S1 that leaves our warehouse. Over the past 4 years, I've inspected roughly 200+ units per quarter. My job isn't to sell you on it. It's to make sure it works, consistently, and that your first impression is a good one. Here's what I actually get asked about the xtool S1, and the real answers—not the marketing fluff.

Can the xtool S1 do color engraving? Isn't that just for CO2?

People see color on metal and assume they need a fiber laser or a CO₂ system with specialized marking solutions. For the xtool S1, the short answer is yes—but you don't use the laser itself to create the color. The color comes from applying a marking spray like CerMark or LaserBond before engraving with the 20W or 40W diode module. The laser bonds the spray to the surface, not the material itself.

My initial approach to this was completely wrong. I thought the 40W module could color-engrave bare stainless steel like a fiber laser. After rejecting a batch of customer samples where the 'color' was just a slightly different shade of grey—we had to redo 22 units at our cost—I learned the real technique.

Is the infrared laser module worth the upgrade? Or is that just for specialists?

Here's the thing: most buyers get the standard diode (10W, 20W, or 40W). The infrared module (1064nm) is a separate add-on. Don't buy it thinking it replaces the diode. It doesn't.

The infrared module's real value is marking on clear acrylic, silicone, and some plastics. The diode struggles with transparent materials (it passes right through). Infrared creates a crisp, white mark on clear acrylic—that's its superpower. I use it for one specific thing: production markings on silicone wristbands for a promotional products client. The diode left a tacky, uneven surface. Infrared gave a clean mark. Cost difference: the module adds about $400–$500 USD depending on the bundle. On a 500-unit order, that paid for itself in zero rejects.

Can you really engrave fabric with the xtool S1? I've heard it just burns.

You can, but
fabric is tricky. The xtool S1 uses a diode laser, which is essentially a high-intensity heating source. It doesn't cut through fabric cleanly like a CO₂ laser unless you're using specific synthetics. For natural fibers like cotton or denim, engraving works great—you get a burned (charred) effect that looks like a faded, vintage print. It's not 'soft' to the touch. It's crisp and tactile.

Here's the real trick: testing. I rejected an entire batch of sample denim patches because our settings defaulted to 'cut.' The fabric frayed and looked like garbage. We now have a specific 'fabric engraving' preset for the S1 that uses lower power and higher speed. My advice: always do a test burn on a scrap of the exact fabric. Cost of that mistake? A $1,200 re-run for a client's event merchandise.

Is it a 'small laser etching machine' or is it actually useful?

Honestly? It's both. The xtool S1 has a work area of about 400 x 400mm (15.75 x 15.75 inches). That is small compared to a 600 x 900mm CO₂ bed. But for a 'benchtop' unit, it's actually pretty generous. If you're etching coasters, phone cases, small signs, or keychains, the size is perfect. If you're trying to make a 24x36 inch sign, you'll pan the laser—which the software does, but it's a pain.

As of January 2025, I've seen it used effectively for:
- Low-volume Etsy shop production (coasters, earrings)
- Small business product branding (engraving SKUs, logos)
- School makerspaces
- Prototyping for gadget enclosures

It is a small laser etching machine with a big appetite. A standard 25,000-unit order run for our best-selling coaster set requires a laser to run 10–12 hours a day for three days.

For a UK buyer, is the xtool S1 the 'best budget laser engraver' right now?

Short answer: yes, but check the plug and shipping. As of January 2025, the pricing is roughly equivalent to the US price once you account for VAT. The 20W kit with air assist runs about £850–£950.

What I don't see enough people mentioning: spare parts and service lead times. If your laser module fails, you're looking at 7–14 days for a replacement from China versus 3–5 days from a UK warehouse (which some distributors offer). The 'budget' part is the upfront price, not the total cost of downtime. If you're a weekend hobbyist, it's the best budget laser engraver in the UK. If you're running a business, factor in the cost of a backup module. We do: we stock two 20W modules for every 50 units in the field.

Wait, I thought you said you reject units. What should I look for when buying used?

If you're buying a used xtool S1, check three things:

1. The laser module's lens: Is it scratched? A speck of dust is one thing. A scratch means someone cleaned it wrong. Reject it.
2. The Y-axis belt tension: Is it tight? If it's loose, the engraving will show a wobble. I've rejected 15 units for this in 2024 alone.
3. The exhaust fan: Hold your hand over the outlet. Does it feel like a strong, steady flow? If it's weak, the fan bearings are shot. That's a £40 part, but it's a sign of neglect.

People assume 'budget' means 'disposable.' The xtool S1 is built to be serviced. The part I have replaced most in QA? The control board's ribbon cable connector. It's a cheap part, but it's a pain to replace if you don't have the right screwdriver. The $50 difference in a replacement cable kit translates to measurably better user satisfaction when the cable fails after 6 months of heavy use.

So, would you buy it yourself?

If I had to start a small engraving business today? Yes. I'd get the 20W module for general work, the air assist (non-negotiable for cleaner cuts), and the rotary bundle if I planned on doing cups or bottles. I'd skip the infrared module unless I had a specific plastic job lined up. I'd order a spare lens and belt at the same time. Total cost for that setup? Roughly £1,200–£1,400. I would expect to break even on a small Etsy shop in about 3 months.

The truth is: the xtool S1 isn't a 'budget' machine if you need industrial throughput. It's a quality entry-level machine that happens to be affordable for the features it offers. The engine is solid. Just don't skip the pre-flight checklist.