Does the FLSUN S1 Pro 3D printer work with SimplyPrint, OctoPrint, Mainsail and Fluidd?
Each way of connecting it, what it needs, and how to set it up.
Ships Klipper; its USB is internal, so OctoPrint runs only on top of Klipper.
Source
Ships with Klipper: OctoPrint only runs on top of it, through the OctoKlipper plugin
What works with SimplyPrint
Connected through Klipper (Moonraker), SimplyPrint supports most of what it offers on the FLSUN S1 Pro: the camera and AI failure detection, remote printing, skipping objects, temperature and movement control and AutoPrint. Not yet in SimplyPrint through Klipper (Moonraker): download the file before the print starts.
Every SimplyPrint feature, for each way of connecting it to SimplyPrint
Connected to SimplyPrint through
SimplyPrint feature
Klipper (Moonraker)
Compatible
Monitoring
Live status and progress
Yes
Webcam
Yes1
AI failure detection
Yes1
Time left
Yes
Layer progress
Yes
Temperatures
Yes
Printing
Starting a print
Yes
Pause, resume and cancel
Yes
Skip objects
Yes
Printer control
Change temperatures
Yes
Moving with the controls
Yes
Homing
Yes
Extrude and retract
Yes
Change print speed
Yes
Fan speed
Yes
Baby stepping
Yes
Send G-code
Yes
Calibration
Change filament
Yes
Bed leveling
Yes
Z-Offset Calibration
Yes
Automation
AutoPrint
Pro
Yes
Download the file before the print starts
No2
Connected to SimplyPrint through Klipper (Moonraker)
Compatible
Monitoring
Live status and progressYes
WebcamYes1
AI failure detectionYes1
Time leftYes
Layer progressYes
TemperaturesYes
Printing
Starting a printYes
Pause, resume and cancelYes
Skip objectsYes
Printer control
Change temperaturesYes
Moving with the controlsYes
HomingYes
Extrude and retractYes
Change print speedYes
Fan speedYes
Baby steppingYes
Send G-codeYes
Calibration
Change filamentYes
Bed levelingYes
Z-Offset CalibrationYes
Automation
AutoPrint ProYes
Download the file before the print startsNo2
Works
Depends
Not supported
Needs a camera
SimplyPrint doesn't support this through this connection yet.
What slicer to use for the FLSUN S1 Pro
None of the slicers in SimplyPrint's cloud has a ready-made profile for the FLSUN S1 Pro, but it takes standard G-code: start from a similar printer's profile and set the bed size, height and nozzle to match.
We only list slicers you can use in the SimplyPrint cloud, so there may be others for the FLSUN S1 Pro.
Cloud-Based Slicer for FLSUN S1 Pro
All supported slicers - directly in your browser with SimplyPrint's online cloud slicer. No installation required. Slice your FLSUN S1 Pro models from any device, anywhere in the world!
Automatic Profile Updates: Profiles are automatically checked and fetched from the slicer GitHub repositories every day, as well as from our own open-source community-driven slicer profile database. This ensures you always have access to the latest profiles.
Note: Other slicers, such as Simplify3D, ideaMaker, SuperSlicer and KISSlicer, aren't in our cloud, so we don't track their profiles. They may still work well with your FLSUN S1 Pro: check the slicer's own documentation or forums for a profile. You can also contribute profiles to our open-source slicer profile database on GitHub.
The app for the FLSUN S1 Pro
SimplyPrint works as the FLSUN S1 Pro's app: on your phone and in any browser, with a slicer in the cloud.
There's no plate swapper or auto-ejection kit for the FLSUN S1 Pro in SimplyPrint yet, but AutoPrint can still keep it printing: once the plate is clear, it starts the next job from your queue.
Ways to automate it
Your own ejection G-codeWrite the routine that clears your plate, and AutoPrint runs it after every print.
FLSUN S1 Pro specifications: bed size, print height and more
Its size, temperatures, multi-material and how it connects, from the maker and our own research.
Size
Build volume
320 x 320 x 430 mm
Bed type
Circle
Bed size
320 mm diameter
Max print height
430 mm
Printing
Max extruder temperature
350 °C
Has heated bed
Yes
Max bed temperature
120 °C
Number of nozzles
1
Direct drive
No
Probing tool / Auto Bed Leveling
Yes
Filament width
1.75 mm
Connecting
Supports serial printing
Unknown
Shipped firmware
Klipper
Files and slicing
Supported file formats
G-code (.gcode, .gco, .g)
The printer
Printer manufacturer / brand
FLSUN
Printer model name
S1 Pro
Made by a company from
China
Disclaimer:
We strive to keep this information as current and accurate as possible, but cannot guarantee its completeness or reliability. Our data is based on user submissions and manufacturer references.
What filament can the FLSUN S1 Pro print?
Filament compatibility for the FLSUN S1 Pro: the materials it can handle, judged from its hotend, bed, chamber and enclosure.
Filament
Suitability
Notes
PLA
Great
The easiest filament to print. Works on almost any printer; a heated bed helps adhesion but is not required.
PETG
Great
Comfortably in range (PETG likes a ~230-250C hotend and a ~70-85C bed).
TPU & flexibles
With care
Possible, but a Bowden extruder makes flexibles harder - print slowly and prefer firmer (higher-shore) TPU.
ABS & ASA
With care
The bed is hot enough, but ABS and ASA warp without an enclosure, which is strongly recommended for clean prints.
Nylon (PA)
With care
Possible with care - an enclosure and very dry filament are essential.
Polycarbonate (PC)
With care
On the edge - PC really wants an enclosed, hot chamber to avoid warping.
Carbon-fiber & glass-filled
With care
Possible if you fit a hardened or wear-resistant nozzle - the abrasive fibers quickly wear a stock brass nozzle.
Tip: this is a general guide from the printer's specs - always check your filament's recommended settings. With SimplyPrint you can save a profile for each spool and track exactly what filament you have in stock.
Best filament for the FLSUN S1 Pro
Filaments the FLSUN S1 Pro prints well, FLSUN's own first, then the best known.
Printers from the same maker, of a similar size, printing the same engineering materials or multi-material like it, that you can buy today. Compare up to four side by side, with their specs and how each connects.
Who makes the FLSUN S1 Pro, and how open FLSUN leaves you: whether its printers run without its cloud, take any filament and slicer, and can be repaired. Each area is rated from public sources.
Openness: Mostly open (4.2 of 5)
Mostly open
Walled gardenOpen
FLSUN is the printer brand of Zhengzhou Chaokuo Electronic Technology, a Chinese company founded in 2015. Since 2017 it has made only delta printers, built for speed: the open-frame T1 series, the enclosed S1 and the large V400 Max all run Klipper. They suit people who print tall parts or want fast prints and are willing to tune a delta.
Founded:
2015 ·
Headquarters:
Zhengzhou, Henan, China ·
Ownership:
Brand of Zhengzhou Chaokuo Electronic Technology Co., Ltd., privately held ·
Website:flsun3d.com
Fairly free to use as you like: Klipper with a local web interface, OrcaSlicer support and a deep spare-parts catalogue. The firmware source came late, as one-time uploads.
Firmware and custom firmware ●●●●●
The S and T series run Klipper, which Tom's Hardware found close to stock on the S1. FLSUN uploaded the Klipper and Moonraker code for the S1, S1 Pro, T1, T1 Pro, T1 Max and T1E to GitHub in August 2025, more than a year after the S1 shipped, as one-time uploads rather than maintained repositories.
[3][4][9]
Local control and integrations ●●●●●
The S1 and T1 series run Klipper with a stock Mainsail interface on the local network, with no account; FLSUN put the printers' Klipper and Moonraker code on GitHub in 2025, and other software can use Moonraker's documented API. FLSUN's app and web platform add remote control and fleet management.
[9][10][4][11][15]
Third-party filament, slicers and parts ●●●●●
Any filament works, and OrcaSlicer ships profiles for the S1, T1 and V400 next to FLSUN's own OrcaSlicer-based slicer (published under the AGPL). The S1 takes a standard removable V6-type nozzle, but effectors and hotend kits are FLSUN delta parts.
[14][6][9]
Repairs and spare parts ●●●●●
FLSUN's US shop lists over 100 spare parts for the S, T and V400 series, down to motherboards, effectors, parallel arms, screens, motors and belts. We found no published CAD for the current printers.
[12]
Data and privacy ●●●●●
Printing over Klipper needs no account. FLSUN's app does, and its privacy policy describes collecting device data, location signals and usage, without saying where the data is stored.
[13]
From SimplyPrintOur own experience working with FLSUN. It isn't part of the rating.
When an FLSUN owner had a problem with SimplyPrint, one of FLSUN's developers spent over an hour in our live chat with our developers, working it out together.
Pros
Fast delta printers that suit tall parts.
Klipper with a Mainsail web interface on your own network, no account needed.
Large spare-parts catalogue, down to boards, arms and effectors.
OrcaSlicer has FLSUN profiles, so you are not tied to FLSUN's slicer.
Cons
Firmware source arrived late and as one-time uploads, not maintained repositories.
Reviewers found the S1 needed slicer tuning for accurate prints and measured the T1 Pro louder than advertised.
Tom's Hardware did not recommend the S1 for beginners.
The privacy policy does not say where app data is stored.
Track record
August 2025: FLSUN published the Klipper and Moonraker code for the S1, S1 Pro, T1, T1 Pro, T1 Max and T1E as separate GitHub repositories, uploaded between 8 and 21 August 2025.
[4][5]
May 2024: FLSUN published the source of FlsunSlicer, its OrcaSlicer-based slicer, on GitHub under the AGPL-3.0.
[6]
October 2022: FLSUN published the Klipper and Moonraker builds for the V400's Speeder Pad on GitHub under the GPL-3.0.
[7][8]
March 2021: FLSUN launched the Super Racer (SR), the delta that it says first brought it wide attention.
[1]
2017: FLSUN says it dropped over 90% of its product lines to build only delta printers, and that its revenue fell by 80% as a result.
[1]
Researched from 15 sources, last checked October 18, 2026. Show sources
Yes. You can connect the FLSUN S1 Pro to SimplyPrint via Klipper (Moonraker), then slice, queue, start and monitor prints from your browser or the mobile app.
How do I connect the FLSUN S1 Pro to SimplyPrint?
Follow our step-by-step setup guide for the FLSUN S1 Pro. It shows how to connect it via Klipper (Moonraker), what you need for each, and which to pick.
What slicer should I use for the FLSUN S1 Pro?
Cura, PrusaSlicer and OrcaSlicer all work with the FLSUN S1 Pro, and you can run any of them in SimplyPrint's online browser slicer - no install needed, on any device.
Can I use OrcaSlicer with the FLSUN S1 Pro?
Yes, but OrcaSlicer has no built-in profile for the FLSUN S1 Pro that we know of: start from a similar printer's profile and set the bed size, height and nozzle to match.
What filament can the FLSUN S1 Pro print?
Based on its specs (hotend up to 350C, heated bed up to 120C), the FLSUN S1 Pro handles PLA or PETG well. See the full filament guide above for ABS, nylon, PC and composites.
Does the FLSUN S1 Pro work with OctoPrint or Klipper?
The FLSUN S1 Pro works with Klipper (Mainsail and Fluidd), and SimplyPrint connects to it through them - so you get cloud access, a queue and camera monitoring on top.
What is the FLSUN S1 Pro's bed size and build volume?
The FLSUN S1 Pro has a 320 x 320 mm print bed and prints up to 430 mm tall, a build volume of about 320 x 320 x 430 mm. See the full specifications table above for bed type, temperatures and more.
Can the FLSUN S1 Pro eject prints automatically?
There's no kit for it that we support yet, but SimplyPrint's AutoPrint can run your own ejection G-code, work with a robot arm through the API, or wait for you to clear the plate, and then start the next job from your queue.
Where can I buy the FLSUN S1 Pro?
From FLSUN's own store, which has shops for the EU and the US. The links on this page go to those stores; some are affiliate links, so we may earn a commission at no extra cost to you.
Affiliate disclosure: Some links on this page are affiliate links. We may earn a commission if you make a purchase, at no extra cost to you. As an Amazon Associate, we earn from qualifying purchases.
China
Klipper (Moonraker) 
PrusaSlicer
OrcaSlicer
BambuStudio
ElegooSlicer
CrealityPrint
Cura
Kiri:Moto
Best for USA: FLSUN's store for the US
FLSUN for the EU