The xTool F1 Ultra for Laser Cutting: What I Learned from 47 Rush Jobs (Acrylic, Aluminum & More)

When I first started coordinating rush manufacturing jobs, I assumed any desktop laser could handle whatever material a client threw at it. That lasted about three days. After a particularly painful incident in early 2024—where a client’s event was 48 hours away and the sample parts looked like they’d been attacked by a toddler—I learned to get *very* specific about machine capabilities.

I work in a high-mix, low-volume environment where a $500 order is small and a $15,000 order demands a 48-hour turnaround. Last quarter alone, we processed 47 rush orders with a 95% on-time delivery rate. That kind of pressure means I can’t afford hype or marketing fluff about what a laser cutter can do. I need hard data.

This FAQ is based on my experience testing (and failing, and succeeding) with the xTool F1 Ultra—a 20W dual laser (Fiber & Diode) machine. It’s aimed at answering the real questions I get from clients and my own team, especially about cutting acrylic, engraving aluminum, and how it compares to the LaserPecker 4.

FAQ: The xTool F1 Ultra in a Real-World Shop

1. Can the xTool F1 Ultra cut acrylic?

Short answer: Yes, but not all acrylics—and not like a CO2 laser.

Here’s where I made my initial misjudgment. I assumed the 20W diode laser (the infrared part of the dual system) would slice through cast acrylic sheets like a hot knife through butter. I was wrong. The diode laser struggles with clear cast acrylic because the beam passes right through it (wavelength issue). It can cut colored acrylic, but the edges will likely need flame polishing for a clear finish.

However, the 20W fiber laser is excellent for marking and engraving on acrylic. For thin acrylic sheets (under 3mm), you can get a passable cut with multiple passes, but you’ll be fighting with potential melting and a rough edge. For anything thicker, especially clear acrylic, I still tell clients they need a CO2 laser or a laser cutting service.

Bottom line for rush jobs: If a client needs a clear acrylic part in 24 hours, the F1 Ultra isn’t my first choice. I’d burn an hour looking for an alternative. But if they need an engraved acrylic nameplate, the F1 is super fast and reliable.

2. How good is the xTool F1 for engraving aluminum?

This is where the machine absolutely shines.

The fiber laser source is the key. It will mark and engrave anodized aluminum beautifully, revealing a crisp, high-contrast white mark. For bare aluminum, you can get a dark mark (or even a slight engraving) depending on the material’s composition, but it’s not deep engraving. It’s a surface modification.

In a recent rush order, a client sent over a bunch of aluminum tags. They assumed we would use a CO2 laser, but I knew the Fiber laser on the F1 Ultra could do the job in a fraction of the time. We dialed in the settings (fast, high power, 1-3 passes), and the finish was perfect. It saved us about an hour of setup and run time compared to our old method.

Verdict: For marking anodized aluminum, it’s an 11/10 machine. For engraving bare aluminum, it’s a solid 7/10—good enough for most functional applications, but don’t expect a deep, tactile groove.

3. LaserPecker 4 vs. xTool F1 Ultra: Which is better for a small workshop?

This comparison comes up constantly. I’ve had a chance to test both (not for a full 6 months, but enough to form a solid opinion). I won't attack the LaserPecker LP5, but I can tell you the hard trade-offs based on my experience.

• The xTool F1 Ultra’s advantage: The dual laser heads (Fiber & Diode). This gives you more material flexibility out of the box. You can engrave metal and cut wood/leather without swapping tubes or machines.
• The LaserPecker 4’s advantage: It’s a more closed, integrated system. The software is simpler for a casual user, and the XY positioning is built into the base. For a dedicated jewelry engraver or someone who mostly marks metal, it’s a good option.

My take (from a rush-order perspective): The F1 Ultra’s versatility wins every time in a shop that gets random requests. I’d rather have a machine that can handle 80% of my jobs than one that’s 20% faster on the job it’s built for. The extra time spent switching between diode and fiber settings is way less than the time lost finding a secondary solution for the odd aluminum tag or plastic part.

4. Can it be used for medical device laser cutting?

This gets into territory that’s outside my specific expertise, so I’ll be careful here. For prototyping and fixture work? Absolutely. We’ve used the F1 Ultra to cut acrylic fixtures and mark stainless steel tools for medical labs.

For production of implantable devices? No. Not even close. Medical device manufacturing requires validated processes, ISO 13485 compliance, and cleanroom environments. A desktop laser put on a desk next to your coffee mug isn’t that. If you’re looking for a medical-grade machine for cutting components, you need a different conversation.

But for making a one-off surgical guide prototype or custom packaging? The precision (especially with the fiber laser for marking stainless steel) is impressive. We once made a batch of 20 stainless steel stencils for a local lab in less than 2 hours. They were super happy.

5. What *can’t* the xTool F1 Ultra do that people assume it can?

Here are the three biggest disappointments I’ve seen from new owners:

1. Cut thick wood (over 6mm) efficiently. It can do it with many passes, but a 50W CO2 laser will cut the same 12mm plywood in one go. The F1 takes several slow passes. It works, but it’s not fast.
2. Engrave clear glass deeply. The diode laser struggles with transparency. You can mark it with a special coating, but it’s not a primary use case.
3. Maintain the same speed on all materials. People see “20W” and expect it to be blasting through everything at max speed. On highly reflective metals, you need to slow down or risk damage to the laser module.

6. How do you pick the right settings for a new material?

This is the secret sauce. I don’t have a single table of “perfect settings” because they vary by batch of material. But here’s my workflow:

I keep a material profile log (a small notebook, not a spreadsheet, honestly). For every new material, I run a material test grid. The F1’s software (xTool Creative Space) has a built-in material test function. I start at 80% power, 200mm/s for diode, and 40% power, 450mm/s for fiber. Then I adjust for speed and power.

I learned this the hard way after ruining a $200 batch of anodized aluminum tags by running the fiber laser too slow. (Surprise, surprise, it melted the coating.) Since then, a 3-minute test saves me a ton of time.

7. Is it the “best” laser cutting machine for all small businesses?

No machine is “best” for everyone. But I can tell you where it fits. It’s the best versatile desktop laser I’ve managed for a general-purpose workshop. If you need a single machine that does 80% of what a small shop needs (engraving metal, cutting wood/leather/paper, marking plastics), it’s an excellent choice.

If you only cut wood for signs, get a CO2 laser. If you only engrave jewelry, get a dedicated fiber laser. The F1 is for the person who gets a call on Tuesday for a metal plaque, and on Wednesday for a wooden keychain, and needs one machine to handle both.