Comgrow T500 Review: A 500x500x500mm Large-Format 3D Printer

A 500mm cube build volume changes what you can realistically print in one piece. The Comgrow T500 promises exactly that: 500x500x500mm of printable space, Klipper firmware, linear rails on all three axes, and a 49-point auto-leveling system to keep large first layers consistent. At current sale pricing around $499, it undercuts most large-format FDM machines. Whether it undercuts them in quality too is the real question.

Build Volume and Footprint

The 125-liter printable volume is the headline. That is roughly eight times the capacity of a 250mm cube printer. In practice, that means full-size cosplay helmets, large engineering prototypes, and batch production of smaller parts without constantly clearing the bed. A full adult helmet that would normally need seams and glue can often print in one go.

Do not confuse build volume with overall size. The frame, gantry, and cable management add significant clearance. Measure your doorway and workbench before ordering. The bed itself is heavy, and the acceleration forces at 500mm/s will flex a flimsy table. You need a stable, heavy-duty surface.

Hardware and Motion System

XYZ linear rails are unusual at this price point and they do improve layer consistency across tall prints. The direct-drive extruder uses a 6.5:1 gear ratio, which helps with flexible filaments like TPU without slipping. The all-metal hotend tops out at 300C, and the hardened steel nozzle handles abrasive materials without swapping nozzles every few prints.

Klipper comes pre-installed. Input Shaping and Pressure Advance are both available, which matters more on a half-meter gantry than on a small desktop machine. Resonance ghosting becomes visible faster when the print head travels further. The 7-inch touchscreen and Wi-Fi connectivity are functional, not fancy.

Print Quality and Speed

The advertised 500mm/s maximum speed is optimistic. Most users will find 200mm/s a more realistic daily setting, especially for detailed parts. At that speed, print quality is competitive with mid-range CoreXY machines. The 49-point bed leveling mesh does its job across the full 500mm bed, but you still need a clean, level surface to start with.

Open-frame design means no heated enclosure. That rules out ABS and polycarbonate unless you build an enclosure yourself. PLA, PETG, and TPU are the sweet spot. If you want to print high-warp materials, budget for an enclosure or look at a fully enclosed large-format printer.

Who Should Buy the T500

Experienced makers, small businesses running batch jobs, and engineers who need full-scale prototypes will get the most from this machine. The 95% pre-assembled kit is approachable, but Klipper tuning, large slicer profiles, and managing a half-meter print bed are not beginner tasks. If you have never leveled a 300mm printer, the T500 will be a steep learning curve.

Final Thoughts

The Comgrow T500 is a capable large-format printer priced aggressively. It prints well, it covers a genuine need for bigger parts, and the hardware choices are sensible. Just respect the footprint, buy a solid table, and do not expect it to act like a beginner machine. If you have the space and experience, the 125-liter build volume is hard to argue with at this price.