S1
Updated 21 May 2026 · Live prices on every page load from Amazon US + UK
Buy on Amazon.com - $999.00 →Affiliate link. Price live from the marketplace, not cached.
At a glance
What this printer gets right and wrong
- ✓ 350°C hot end - handles carbon-fibre nylons and PC, not just the easy stuff.
- ✓ 44.0 L build volume - room for helmets, large functional parts, bulk runs.
- ✓ 110 mm³/s volumetric flow - genuinely fast, not just advertising-fast.
- ! Nothing stands out as a clear weakness on the spec sheet - but spec sheets never capture firmware polish, customer support or long-term reliability. Read owner reports before committing.
Head-to-head spec + price table against the FLSUN S1. Verified printers on this marketplace only.
At this price you're well past the sweet spot for a first printer. There's no shame in starting with something cheaper - you'll learn more on a 200-400 machine and have money left for filament.
This is the kind of move that makes you wonder why you put up with your old machine for so long. Faster, more rigid, and the first layer stops being a gamble.
No active heated chamber or a hot end that tops out below 280°C means no reliable ABS, ASA, nylon or PC. Fine for a hobbyist, wrong tool for commercial work in engineering materials.
Verdicts are rule-driven from the spec sheet and current price ($999). They don't capture firmware polish, support quality, or reliability - so treat them as a sanity check, not a final answer.
Live offers
Every live listing on the English-language Amazon marketplaces that I've matched to this printer. Cheapest first. Affiliate links.
- 🇺🇸 FLSUN S1 3D Printer,1200mm/s Max High-Speed FDM 3D Printers, 350°C Direct Extruder with Real-time Intelligent Monitoring, Stable Delta Structure,Fully Auto Leveling, Works Right Out of BoxAmazon.com · New$999.00View
Close alternatives - what $999 gets you elsewhere
Think of this like the shopping-cart upsell: here's what a tenner more or less could buy you in roughly the same category. Same FDM tech, same marketplace, all prices live. Stretches are data-driven; they're not sponsored placements.
Save the money, similar specs on paper. You'd give up: 44.0 L vs 11.6 L build volume, 350°C hot end vs 290°C.
Get: 7.7 L more build volume (51.7 L) · 370°C hot end (was 350°C).
Get: CoreXY motion - faster, more rigid.
Frequently asked
What materials can the FLSUN S1 print? +
At $999 the FLSUN S1 has the hot end for engineering materials (350°C) but no active chamber, so ABS and nylon will warp on anything larger than a phone case. Treat it as a PLA/PETG/TPU workhorse with headroom for the occasional small ABS part.
How fast is the FLSUN S1? +
Genuinely fast. Volumetric flow is 110 mm³/s, which means the hot end can melt plastic fast enough to keep up with the motion system. This is the tier where "500 mm/s" marketing claims translate into actual finished parts in half the time of a bedslinger.
How big can I print on the FLSUN S1? +
320×320×430 mm (44.0 L). Big enough for helmets in one piece, full-scale cosplay props, or multiple medium parts in one run. Reliability starts mattering at this scale - a failed 20-hour print stings.
Does the FLSUN S1 have auto-levelling? +
Yes - Automatic auto-levelling probe. Not quite as clean as load-cell or LiDAR, but reliable once calibrated and a world better than manual paper-under-the-nozzle.
Is the FLSUN S1 worth $999? +
$999 is serious hobbyist territory. For the FLSUN S1 to justify this over a $500 machine it needs to deliver genuine speed (volumetric flow), reliability at speed, or access to engineering materials. Check the spec table above against those three.
