Elegoo Saturn 4 Ultra Review: The Best Resin 3D Printer Under $400

Setup is straightforward — level the build plate with the provided paper method, install the FEP film (pre-installed on our unit), and run a test print. Elegoo includes a calibration print (exposure calibration tower) that takes 15 minutes and tells you exactly where to set exposure time for your chosen resin. We ran the calibration with three resins on arrival: Elegoo ABS-Like, Siraya Tech Blu, and Anycubic Eco. Each needed slightly different exposure settings (2.2s, 2.4s, and 2.1s respectively at default parameters), which took an afternoon to dial in but produced perfect results thereafter.

This is where the Saturn 4 Ultra earns its score. We printed 28mm DnD miniatures, Warhammer Space Marines, and jewelry test masters. The 19 µm XY resolution captures detail that's visible only under magnification — sword wire wrapping, chainmail individual links, facial features with genuine expression. Comparison prints against the previous Saturn 3 Ultra showed the 4's tilt mechanism produces fewer layer separation artifacts on thin horizontal surfaces. Miniature arms, weapons, and fine filigree were more consistently successful.

For jewelry masters (pieces designed for lost-resin casting), the Saturn 4 Ultra performs admirably. Ring shanks, stone seat details, and pavé patterns come out clean. We use Siraya Tech Cast resin for casting masters — it burns out more completely than standard ABS-like resins. For engineering prototypes requiring tight tolerances, we measured ±0.05mm accuracy on calibration cylinders — competitive with machines twice the price. The large plate is particularly useful for printing multiple tolerance variants simultaneously.

The Saturn 4 Ultra's tilt mechanism is genuinely faster and more reliable than the FEP peel method on older printers. Traditional peel requires lifting the build plate straight up to separate the print from the FEP film — a violent action that can fail thin supports. The tilt mechanism instead peels the FEP at an angle, dramatically reducing the separation force. In practice: prints that failed on an older Saturn 2 due to broken supports completed successfully on the Saturn 4 Ultra with identical support settings. We reduced support contact diameter by 20% compared to our older settings and had zero failures across 40 prints.

The Saturn 4 Ultra works with any 405nm resin from any manufacturer — a critical advantage over proprietary systems. We tested resins from Elegoo, Siraya Tech, Anycubic, and Phrozen. All worked with minor exposure adjustments. Running costs: standard ABS-like resin runs $25–35/kg. A typical 28mm miniature uses 3–8g of resin (including supports and purge) — less than $0.30 per model. A full build plate of 30 miniatures uses roughly 120–200g ($4–7 in resin). This undercuts injection-molded resin costs significantly for anyone painting miniatures at scale.

Buy it if: you paint tabletop miniatures and want to print your own models, you make jewelry and need a casting master printer, you're a dental lab or product prototyper needing ±0.05mm accuracy, or you're upgrading from an older 4K/6K resin printer. Skip it if: you're brand new to resin printing and not ready to handle chemical safety precautions, you only need one or two miniatures occasionally (start with a Mars-class printer instead), or your use case is functional mechanical parts (FDM is more practical).