In my first year handling custom engraving orders (this was back in 2022), I thought I had it all figured out. I'd bought the xtool-s1, set up my workshop, and was feeling pretty good about myself. Everyone warned me: "Metal engraving is a different beast. You need the right modules, the right prep." I nodded along, thinking, How hard can it be? It's just a different material.
I only believed that advice after ignoring it and destroying a $450 order of brass plaques.
The Setup: Confident and Underprepared
It was a Tuesday afternoon in September 2022. A local artist had commissioned 40 small brass tags for a sculpture project. I'd engraved leather and acrylic beautifully on my xtool-s1. The machine was my pride and joy. I figured, "Laser is laser. Metal just takes a few more passes."
From the outside, it looked like a simple job. The reality is that brass has high thermal conductivity and reflectivity. A standard diode laser module (even at 20W) struggles to create a mark without the right surface preparation. I didn't know this. Or rather, I didn't believe it applied to me.
I loaded the brass tags into the machine, selected a generic "metal" setting I'd found on a forum, and hit start. The machine ran for 30 minutes. I came back, expecting beautiful, dark engravings. Instead, I got a faint, inconsistent ghost mark that looked like a dirty watermark. On some tags, it had burnt in patches. On others, there was nothing at all.
The Disaster: A $450 Lesson in Surface Preparation
I'll be honest—I tried to save it. I ran it again. And again. Each time, the brass got hotter, the marks got worse, and I started to see the machine struggle. I baked a $320 custom order (the brass tags) into the ground, trying to force a result. That error cost $890 in redo cost—$320 for the ruined brass, $320 for replacement material, and $250 in rush shipping for a 1-week delay.
(Should mention: I also had to call the client and explain what happened. That was the worst part.)
People assume that a more powerful laser solves everything for metal engraving. What they don't see is that without a proper marking solution or coating, even a 40W module just heats the metal unevenly. The problem wasn't the machine's power; it was my ignorance of the material science.
The Turnaround: Finding the Right Laser Cutting Supplies
After that disaster, I did something I should have done first: I actually read the damn documentation and talked to people who specialized in metal marking. I learned about the importance of spray-on marking solutions for metals. I bought the proper xtool s1 rotary bundle for cylindrical items (which I'd also been faking my way through) and, crucially, a metal marking spray.
The next order was for 20 stainless steel dog tags. Same machine, same basic setup, but with a $15 can of marking spray and a careful test on a scrap piece of aluminum. The result? Perfect, dark, permanent marks. The client was thrilled. The difference wasn't the hardware; it was the right laser cutting supplies and the humility to admit I didn't know what I was doing.
Hit 'confirm' on that order and immediately thought, "Could I have avoided the $890 mistake?" The two weeks until I got my new workflow sorted were stressful, but the lesson was worth far more than the cost. (Oh, and I still use that same can of marking spray. It lasts a long time.)
What I Learned (So You Don't Have to)
I'm now the one in our small shop maintaining the checklist for new operators. Here are the three things I failed to do that day:
- Test on scrap first. Always. Every new material. Even if you've done it before. I should have bought a sample 5-pack of brass tags for $8 instead of gambling on a $320 order.
- Use the right consumable. For metal, a marking spray (like CerMark or a comparable brand) is non-negotiable for the xtool-s1. The laser doesn't bond with the metal; it bonds with the spray. This is the secret that forums often skip.
- Be honest about your machine's limits. The xtool-s1 is a fantastic desktop workhorse for wood, acrylic, leather, and glass. For direct metal engraving (without a coating), it's not the right tool. That's not a failure. The vendor who says "this isn't our strength" earns my trust.
This was true five years ago when I started, and it's true today: understanding the material is more important than understanding the machine. I'd rather work with a specialist who knows their limits—like the xtool-s1 for hobbyist and small business work—than a generalist who overpromises on metal engraving.
Prices as of May 2024; verify current rates for marking sprays and replacement materials. Source: USPS for shipping costs on those replacement brass tags ($9.60 per 8-oz flat rate envelope, as of January 2024).
