About the Reviewer: Loyal Moses
Loyal Moses is a leading 3D printing YouTuber known for blending technical expertise with accessible content. His channel highlights printer reviews, filament insights (like his ASA material analyses), and creative projects, while his livestream The LM Show engages the maker community. Praised for authenticity, he uncovers both successes and challenges in additive manufacturing, from troubleshooting to showcasing large-scale prints like the Boba Fett helmet here. .
3D printing has evolved far beyond its nerdy origins, and the Eryone Thinker X400 is a testament to that transformation. As someone who’s spent years diving into the nuances of additive manufacturing, Loyal Moses was eager to put this 400x400x400mm "monster machine" to the test. Spoiler alert: it didn’t just meet expectations—it shattered them, even through a few rocky initial hurdles.
1. First Impressions: When Size Meets Industrial Design
Unboxing the Thinker X400 is a workout in itself. Weighing 130 lbs and measuring 27x25x32 inches, this beast demands a sturdy workbench or floor space. But Eryone’s design team deserves credit: the removable acrylic panels (front glass doors, sides, back, and top) not only give it an industrial aesthetic but also simplify maintenance. The four industrial footmaster feet are a game-changer—convertible from smooth casters for mobility to vibration-absorbing anchors with a twist of red wheels.
Aesthetic gripes? The spool holder, a 2020 extrusion bolted to the frame, stands tall enough to be a head-knocker (ask me how I know), but it’s a minor nitpick for an otherwise thoughtful design. The front 5-inch touchscreen (familiar to Klipper users) and HD camera for remote monitoring add modern touches, though Loyal Moses quickly disabled the "AI camera" feature after false positives paused prints—more on that later.
2. Specs That Speak to Production-Grade Ambitions
Let’s dive into the numbers that make the Thinker X400 a production powerhouse:
- Build Volume: 400x400x400mm (yes, that’s 64 liters of print space)
- Speed: Up to 500mm/s with 10,000mm/s² acceleration
- Precision: 0.1–0.3mm layer resolution (0.08–0.32mm adjustable)
- Materials: PLA, PETG, TPU (≤95A), ABS, ASA, PC, PA, carbon/glass fiber composites
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Hot-End & Bed: 300°C hot-end, 120°C heated bed with double-sided magnetic PEI plate
Learn More About Thinker X400：https://eryone3d.com/products/thinker-x400
The CoreXY design with four independent Z-axes and 25-point auto-leveling feels overbuilt in the best way. Even the drag chains organizing internal wiring exude durability. And let’s talk compatibility: swapping nozzles (0.4mm stock, optional 0.6–1.0mm) is a breeze, and the direct-drive extruder handled my LM Sparkle Green PLA like a champ.
3. The Ultimate Test: Printing a 390mm Boba Fett Helmet
Loyal Moses wanted to push the Thinker X400 to its limits—literally. I scaled a Boba Fett helmet to 385–390mm, nearing the build volume’s max. The catch? Loyal Moses used almost no infill, just a sliver of lightning infill at the top. This 20-hour print relied on two thin walls to hold its shape—talk about a precision test.
The Results:
- Despite Loyal Moses nerves (seriously, watching a thousand layers stack with flimsy walls is stressful), the printer laid down filament with surprising consistency.
- Surface quality was shockingly clean, even at 500mm/s. A few minor blips from the lightning infill algorithm were negligible.
- Compare this to a failed attempt on a far pricier Rais 3D machine years ago: the Think X400’s stability and layer adhesion were leagues ahead.
Sure, Loyal Moses messed up by increasing speed mid-print (leading to a visible line), but the helmet still finished—proof that this behemoth can handle audacious prints.
4. Hiccups and How Eryone Fixed Them
No review is honest without addressing flaws. Loyal Moses's Thinker X400 arrived with shipping damage (cracked acrylic, upside-down packaging), leading to a faulty hot-end. Symptoms included temperature drops, nozzle crashes, and constant "air printing."
Eryone’s Response:
- Customer support diagnosed the issue quickly: "Unplug the hot-end and replug it." When that temporarily worked, they sent a replacement hot-end.
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Installing the new hot-end solved all problems. The printer hasn’t missed a beat since—proof that even industrial machines need robust support, and Eryone delivers.
Note: Production models will have auto belt tensioning (my pre-production unit had manual tensioning) and refined fan placements, addressing minor quirks.
5.The Good, the Okay, and the "Meh"
Pros: Why the Thinker X400 Shines
- Scale Without Compromise: Print large parts or batch small ones—flexibility is key.
- Energy Efficiency: 680W max draw (200–300W during prints) is impressive for such a beast.
- Price Point: $1,299 early bird (first 100 units) or $1,399 (next 500) is a steal for industrial-grade specs.
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Reliability Post-Fix: Once dialed in, this is one of the most consistent printers I’ve used.
Cons: Room for Improvement
- AI Camera Skepticism: As with most AI systems, false positives abound. Stick to manual monitoring.（AI detection can be set on the screen and can be turned off
- Slicer Profiles: Orca Slicer support is great, but more pre-configured profiles for niche materials would help.
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Noise During Movement: Steppers are louder than average on X/Y axes, though not unbearable.
6. Who Should Buy the Thinker X400?
- Print Farms & Factories: The stackable design, production software, and bulk-print capabilities make it a workhorse.
- Makers Craving Scale: If you’ve outgrown smaller printers, this is your ticket to giant props, prototypes, or functional parts.
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SMEs on a Budget: Industrial performance without the six-figure price tag? Yes, please.
7. Final Verdict: A Monster with a Heart of Gold
The Eryone Thinker X400 isn’t just a big printer—it’s a statement. It proves that high-volume 3D printing can be accessible, reliable, and even affordable. Loyal Moses's initial shipping woes were frustrating, but Eryone’s support turned a potential disaster into a showcase of durability.
Will I keep using it? Absolutely. In fact, that Boba Fett helmet—now with a visor and accessories—sits proudly in my studio, a testament to what this machine can achieve. If you’re ready to go big, the Thinker X400 is waiting to impress.
Disclosure: Eryone provided the Thinker X400 for testing, but opinions are —warts and all.Check out Loyal Moses‘s Youtube channel, Loyal Moses, for more deep dives into 3D printing projects like this helmet build!
