Elegoo
Saturn 4 Ultra 16K
Based on 174 Reddit mentions
$519.99
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Reddit mentions
Original Reddit posts and comments behind this analysis.
Resin printing "arms race" over?
Same as before. Expect 12 months between cycles. This year was odd, printers got released on a shorter cycle. The Saturn 4 Ultra 16K was probably supposed to be the Saturn 5, but Elegoo released it early (only 7-8 months after the Saturn 4/4 Ultra). Probably because Uniformation was releasing the 16
...stickninjazero in r/resinprinting
August 19, 2025 10:10 PM
40
Saturn 4 Ultra 16K, over a year of troubleshooting and I still can't fix it.
The S4U springloaded plate means that wait times are even more mandatory than regular printers. The light turns on way before the resin has settled and the springs have found home. This means you get a layer thicker than supposed especially at 20um, your bottom layers are probably closer to 0.5 or e
...KalleKantola in r/ElegooSaturn
July 8, 2025 8:02 PM
17
First print not sticking ( Saturn 4 Ultra 16k)
All printers need more Rest After Retract (Chitubox) / Wait Before Print (Lychee) / Wait time before cure (UVTools) for the base layers. Your adhesion failure here is because your raft is printed with over thick layers. Almost looks like the raft was failing to adhere from the start or isn't actuall
...DarrenRoskow in r/resinprinting
May 25, 2025 11:49 PM
10
Anti Aliasing Saturn 4 Ultra
I recently found this as well. It appears recent firmware to avoid the "lasagna bug" is either skipping layers or skipping the gray pixels when it can't load the image to the LCD fast enough. I have similar results with my own experiments in vertical smoothing / AA here: https://www.reddit.com/r/res
...DarrenRoskow in r/ElegooSaturn
August 12, 2025 2:02 AM
10
Saturn 4 Ultra 16k - keep or wait for Saturn 5?
No, these are not graphics cards. There's a limit to their technological advancement. 16k print is close to injection moulding, any higher resolution is approaching gimmick status. Unless they revamp the tilt vat and improve fail detection, I can't see what tech improvements are to be made. I'm here
...Hupdeska in r/ElegooSaturn
December 16, 2025 7:52 PM
5
Dead Spot on Screen
That will be a screen replacement. And, yeah it's getting too common with the S4U just past the 1 year mark. Here's my theory on the source of the problem - bad software configuration of the automatic leveling system and lack of a baked in Rest After Retract along with a couple methods to prevent th
...DarrenRoskow in r/ElegooSaturn
August 13, 2025 3:11 AM
8
Been having some issues on a print with my saturn 4 ultra
Just going to copy-paste my comment from a couple weeks ago on the matter of S4U dead LCDs: For you next LCD, definitely look into use Rest After Retract (Chitubox) / Wait time before cure (UVTools name) via UVTools for the first 20 layers or so like the following settings: https://www.reddit.com/r/
...DarrenRoskow in r/ElegooSaturn
November 9, 2025 8:35 PM
7
Suddenly getting these "flakes" in my prints, could use help.
I was going to ask if it was a Saturn 4 Ultra with the crazy thick raft you've got going on in the first picture. When you let it print rafts that far over thickness (what is that 1.7-2.1mm for a 1mm raft?). Your LCD has pressure spot failures, and it is likely because the build plate and overly thi
...DarrenRoskow in r/ElegooSaturn
July 5, 2025 3:39 AM
7
WARNING: Saturn 4 Ultra LCD dead prematurely. Elegoo admits "pressure damage" but denies warranty citing "3-month rule" on a known design flaw.
I've written up a longish examination of this issue -- your rest time is too low at the start of the print: https://www.reddit.com/r/ElegooSaturn/comments/1jwcwg2/fixing_saturn_4_ultra_elephant_foot_and/ The easiest improvement to LCD wear going forward is to substantially increase the Rest After Retract
...DarrenRoskow in r/ElegooSaturn
January 21, 2026 9:28 PM
4
Prints not sticking anymore
I'm having the same issues as this guy it was working fine yesterday but now stuff won't stick to the plate I changed the fep about a week ago and its only been through 10k cycles Im using a saturn 4 ultra 16k and my exposure times are set the way elegoo wants it im using 8k 3.0 resin which I've bee
...CommanderChaos17_ in r/PrintedWarhammer
November 3, 2025 9:10 PM
6