ELEGOO Mars 4 Ultra 7" 9K Mono LCD MSLA Resin 3D Printer

Reader reviews

1. J Juan Antonio Figueroa Torres 5/5

   Very good printer for the money

   Solid machine — I recommend it for its price and print quality.

2. R Robert london 5/5

   Good start — enjoying the learning curve

   Really liking it so far. I’m still learning resin workflows but getting progressively better with each print.

3. C Charles V Schneider 4/5

   One of the best SLA units I’ve used

   After months of use it stands out as one of the best SLA printers I’ve owned. I had trouble connecting it to Wi‑Fi at first and used USB for months, so I dock one star for that. It’s quiet, rarely needs re-leveling, and with a carbon filter fumes are much reduced. Speed and print quality surpass earlier Mars models.

4. J JOSÉ F. 5/5

   Excellent — very functional

   Very functional and reliable so far.

5. R Rodrigo 5/5

   Arrived in good condition

   Good product and arrived well packed.

6. D D. Eckert 1/5

   Screen died in under two months — poor service

   The screen stopped working after about six weeks — prints came out as a flat sheet. Support offered a replacement, but guidance on disassembly omitted details about excessive hot glue on connectors; while following it I damaged a motor cable plug and they refused to replace it for free. The replacement that arrived later had a faulty ribbon and produced mirrored prints. I won’t buy from this brand again.

7. F francisco javier 5/5

   Intuitive and high-quality prints, language resources needed

   The machine is easy to use and prints are high quality. I couldn’t find a Spanish leveling video and had to subtitle a Portuguese tutorial, but once I understood cleaning and post-curing the results were great. Be careful handling resin — it’s toxic and requires attention.

8. J Jacob 4/5

   Leveling nightmare — but fixable with care

   After an initial unit with leveling issues I received a replacement and saw the same behavior. I discovered a reliable process: remove the vat, loosen all four screws, set Z to zero with a feeler card, press the plate to the card, tighten, then fine-tune Z offset by -0.1 mm steps until the card barely moves. Once leveled and with correct exposures I ran batches of 3–7 prints without re-leveling.

9. C Chronatog 5/5

   Impressive for a first 3D resin printer

   This is my first 3D printer and it exceeded expectations. I had one user-error issue, but overall the product quality and delivery timing were excellent. Very satisfied.

10. M Miguel B. 1/5

    Great speed and quality, but watch for light leaks

    I’m on the fence about keeping it. Pros: very fast (pieces that took 10+ hours in FDM done in 3–4 hours), excellent surface finish, and an adequate build volume if you arrange parts wisely. Cons: I noticed a light leak around the touchscreen that could lead to failure, and shortly after my purchase it went on discount—felt frustrating. Assembly seems sturdy, but the panel light issue is a concern.

11. C Craig 5/5

    Support responded quickly and replaced the plate

    Build quality is good overall, but my original build plate had low spots. I emailed tech support and got a helpful reply the next day. I sent a photo and they shipped a replacement which arrived in four days. The new plate works perfectly and I’m printing miniatures and dice now.

12. A A.J. 5/5

    Less hassle than FDM — prints great out of the box

    Much easier than my temperamental FDM machines and far better finish. I followed the level procedure, added resin, and printed a rook from USB without trouble. I had a similar-brand unit that threw random screen-connection errors; rather than risk that I returned it and chose this Elegoo. Very happy so far.

13. T Travis Holland 5/5

    Arrived with a bent leadscrew — disappointing QC

    Upgrading from an older, low-res printer, I hoped for a big jump in quality. The machine printed, but the leadscrew was bent at the motor end and the axis wobbled about an inch, producing visible artifacts. The linear rail felt solid and the print completed, but the bent screw ruined otherwise good results. Had to return it.